model 277 bed knife grinder owner’s manual (12-08).pdf · model 277 bed knife grinder warning you...

1 27550 (12-08)

MODEL 277Bed KnifeGrinder

WARNINGYou must thoroughly read and understand this manualbefore operating the equipment, paying particular attention to the Warning & Safety instructions.

OWNER’SMANUAL

2

SAFETY INSTRUCTIONSSafety Awareness Symbols are inserted into thismanual to alert you to possible Safety Hazards.Whenever you see these symbols, follow theirinstructions.

The Warning Symbol identifies special instructions orprocedures which, if not correctly followed, could resultin personal injury.

The Caution Symbol identifies special instructionsor procedures which, if not strictly observed, couldresult in damage to or destruction of equipment.

13. MAINTAIN GRINDER WITH CARE. Followinstructions in service section of the Manual for

lubrication and preventive maintenance.

14. DISCONNECT POWER BEFORE SERVICING,or when changing the grinding wheel.

15. REDUCE THE RISK OF UNINTENTIONALSTARTING. Make sure all switches are OFFbefore plugging in the Grinder.

16. USE RECOMMENDED ACCESSORIES.Consult the manual for recommendedaccessories. Using improper accessories maycause risk of personal injury.

17. CHECK DAMAGED PARTS. A guard or otherpart that is damaged or will not perform itsintended function should be properly repaired orreplaced.

18. NEVER LEAVE GRINDER RUNNINGUNATTENDED. TURN POWER OFF. Do notleave grinder until it comes to a complete stop.

19. KNOW YOUR EQUIPMENT. Read this manualcarefully. Learn its application and limitations aswell as specific potential hazards.

20. KEEP ALL SAFETY DECALS CLEAN ANDLEGIBLE. If safety decals become damaged orillegible for any reason, replace immediately.Refer to replacement parts illustrations in thisManual for the proper location and part numbers ofsafety decals.

21. DO NOT OPERATE THE GRINDER WHENUNDER THE INFLUENCE OF DRUGS,ALCOHOL, OR MEDICATION.

1. KEEP GUARDS IN PLACE and in working order.

2. REMOVE WRENCHES AND OTHER TOOLS.

3. KEEP WORK AREA CLEAN.

4. DON'T USE IN DANGEROUS ENVIRONMENT.Don't use Grinder in damp or wet locations. Machine is for indoor use only. Keep work areawell lit.

5. KEEP ALL VISITORS AWAY. All visitors shouldbe kept a safe distance from work area.

6. MAKE WORK AREA CHILD-PROOF withpadlocks or master switches.

7. DON'T FORCE THE GRINDER. It will do thejob better and safer if used as specified in thismanual.

8. USE THE RIGHT TOOL. Don't force the Grinderor an attachment to do a job for which it was notdesigned.

9. WEAR PROPER APPAREL. Wear no looseclothing, gloves, neckties, or jewelry which mayget caught in moving parts. Nonslip footwear isrecommended. Wear protective hair covering tocontain long hair.

10. ALWAYS USE SAFETY GLASSES.

11. SECURE YOUR WORK. Make certain that thebedknife is securely fastened with the mountsprovided before operating.

12. DON'T OVERREACH. Keep proper footing andbalance at all times.

3

SAFETY INSTRUCTIONS

IMPROPER USE OF GRINDING WHEEL MAY CAUSEBREAKAGE AND SERIOUS INJURY.

DO1. DO always HANDLE AND STORE wheels in a

CAREFUL manner.

2. DO VISUALLY INSPECT all wheels beforemounting for possible damage.

3. DO CHECK MACHINE SPEED against theestablished maximum safe operating speedmarked on wheel.

4. DO CHECK MOUNTING FLANGES for equaland correct diameter.

5. DO USE MOUNTING BLOTTERS whensupplied with wheels.

6. DO be sure WORK REST is properly adjusted.

7. DO always USE A SAFETY GUARDCOVERING at least one-half of the grinding wheel.

8. DO allow NEWLY MOUNTED WHEELS to runat operating speed, with guard in place, for atleast one minute before grinding.

9. DO always WEAR SAFETY GLASSES or sometype of eye protection when grinding.

10. DO TURN OFF COOLANT before stopping toavoid creating an out of balance condition.

DON'T1. DON'T use a cracked wheel or one that HAS

BEEN DROPPED or has become damaged.

2. DON'T FORCE a wheel onto the machine ORALTER the size of the mounting hole - ifwheel won't fit the machine, get one that will.

3. DON'T ever EXCEED MAXIMUMOPERATING SPEED established for thewheel.

4. DON'T use mounting flanges on which thebearing surfaces ARE NOT CLEAN, FLATAND FREE OF BURNS.

5. DON'T TIGHTEN the mounting nutexcessively.

6. DON'T grind on the SIDE OF THE WHEEL(see Safety Code B7.2 for exception).

7. DON'T start the machine until the WHEELGUARD IS IN PLACE.

8. DON'T JAM work into the wheel.

9. DON'T STAND DIRECTLY IN FRONT of agrinding wheel whenever a grinder is started.

10. DON'T FORCE GRINDING so that motorslows noticeably or work gets hot.

AVOID INHALATION OF DUST generated by grinding and cutting operations.Exposure to dust may cause respiratory ailments. Use approved NIOSH orMSHA respirators, safety glasses or face shields, and protective clothing.Provide adequate ventilation to eliminate dust, or to maintain dust level belowthe Threshold Limit Value for nuisance dust as classified by OSHA.

Grinding is a safe operation if the few basic rules listed below are followed. Theserules are based on material contained in the ANSI B7.1 Safety Code for "Use, Careand Protection of Abrasive Wheels". For your safety, we suggest you benefit fromthe experience of others and carefully follow these rules.

4

GETTING TO KNOW YOUR GRINDER

The Model 277 Model Features:

FeaturePartially Enclosed CabinetMagnetic Mount for Bed KnifeCenters for Mounting Bed KnifeInfeed, Manual ControlTravel, Automatic Variable SpeedFlood Coolant SystemGrinding carriage Mounted Diamond Dresser

Transformer for 220 Volts, 50/60 Hz - Optional

SPECIFICATIONS

POWER REQUIREMENT:115 Volts, 50/60 Hz, 15 Amps

DIMENSIONS:61” (155 cm) wide x 32” (82 cm) deep x81” (206 cm) high, 750 lbs. (340 kg)

SHIPPING DIMENSIONS:74” (188 cm) wide x 41” (104 cm) deep x68” (173 cm) high, 935 lbs. (424 kg)119.4 cubic feet (3.4 cubic meters)

This machine is intended for reel mower bedknife grinding ONLY. Any useother than this may cause personal injury and void the warranty.

To assure the quality and safety of your machine and to maintain thewarranty, you MUST use original equipment manufactures replacementparts and have any repair work done by a qualified professional.

ALL operators of this equipment must be thoroughly trained BEFOREoperating the equipment.

Do not use compressed air to clean grinding dust from the machine. Thisdust can cause personal injury as well as damage to the grinder. Machineis for indoor use only. Do not use a power washer to clean the machine.

5

GETTING TO KNOW YOUR GRINDER (Continued)

Symbols for Read operators manual, wearsafety glasses and disconnect power beforeservicing.

Symbols for sharp object which will causeserious injury and symbol for keep visitors a safedistance away from machine.

Symbols for caution relating toRPM of motor and minimumsafe rated RPM of the grindingwheel.

Symbol identifying a panel, cover,or area as having live electricalcomponents within.

The grinder is equipped with a high-low voltage relay which isfactory preset at 100-140 VAC. If the power supply line does notdeliver 100-140 VAC power under load, the relay will open and tripout the starter. If this occurs, your power supply line is incorrectand must be correct before proceeding further with the grinder.

Low Voltage Relay

6

OPERATING INSTRUCTIONS

OPERATION

The Controls for the Model 277: Learn the function of each switch and knob on thecontrol panel. As you read and learn about each knobyou are encouraged to turn that knob on and view thatparticular operation. See FIG. 4.

ALWAYS WEAR PROPER SAFETYEYEWEAR WHEN OPERATINGYOUR GRINDER. NEVER TURNON YOUR GRINDER WITHOUTFIRST PUTTING ON SAFETYEYEWEAR.

EMERGENCY STOP PUSHBUTTONThe red pushbutton is the power off, emergercy stopswitch. Pulling out will allow the main power to be turnedon and pushing in will turn all power off. The large buttontype design allows a quick stop of all power in anemergency situation.

SYSTEM START PUSHBUTTONThe green pushbutton is the system start switch. Pushingit will engage the magnetic starter and power the controlpanel. The magnetic starter will not engage unless theemergency stop pushbutton is pulled out and the guarddoor safety switch isengaged.

GRIND MOTOR SWITCHThe grind motor switch turns the Grinding Wheel Motor onand off.

COOLANT PUMP SWITCHThe coolant pump switch turns the coolant pump on andoff. There is also a valve on the side of the grinding headto control the amount of the flow.

TRAVERSE POWER SWITCHThe travel power switch turns the traverse motor on andoff. It controlls the side to side movement of the carriageand grinding head.

TRAVERSE SPEED CONTROL POTENTIOMETERThis control knob sets the speed of traverse for thegrinding carriage. When turned on to minimum, thecarriage will stop. When turned to the maximum, thecarriage moves back and forth at full speed. Whenlearning to use this machine, it is a good idea to set thisspeed at minimum, start the other functions, then slowlyincrease the speed to observe that your operation and setup are correct.

GRINDMOTORSWITCH

COOLANTPUMPSWITCH

TRAVERSESWITCH

EMERGENCYSTOPPUSHBUTTON

TRAVERSESPEEDCONTROL

FIG. 4

SYSTEMSTARTPUSHBUTTON

7

OPERATING INSTRUCTIONS (CONTINUED)

TRAVEL MECHANISM RELEASE (FIG. 5)To move the grinding head from side to side manually,there is a release located on the front, bottom of thecarriage. To disengage the carriage drive system,rotate the red handle engagement lever to the downposition. To engage the carriage drive system, rotatethe red handle engagement lever to the up position.See FIG 5.

PROXIMITY SWITCHES (FIG. 6)Two movable switches determine the left and rightlimits of carriage traverse. An LED on the switchlights when the switch actuator bracket on the bottomof the carriage gets close to the head of the switch.Note, there should be a 3/16 gap between theproximity switch head and the traverse actuatorbracket. See FIG. 51 on Page 34.

FIG. 5

FIG. 6

COOLANT SYSTEM (FIG. 7)

Coolant NozzleDirects a stream of coolant onto the bedknife andgrinding wheel. For precise aiming, the nozzle andconnecting tubing are completely flexible.

NOTE: The connecting tube can be shortened byremoving segments as desired

Coolant Flow ValveControls the volume of coolant flowing to the nozzle.Use only enough flow to cool the bedknife. Excessflow will cause excess splashing - and won't improveperformance.

FIG. 7Flexible tube &Nozzle

Flow valve

Proximity switches

8

GRINDING HEAD (FIG. 8 AND FIG 9)

Vertical Eccentric Adjustment and LockMoves the grinding head up and down.

Horizontal HandwheelMoves the grinding head infeed in and out.

Horizontal Adjustment ScaleCalibrated in .002 in [.05mm] increments, so youcan accurately move the grinding wheel in foreach pass across the face of the bedknife.

Wheel Guard Lock ScrewsA T-knob holds the guard in position. Loosen it topivot the guard when the guard interferes with thebedbar.

Diamond Wheel DresserAllows you to dress the grinding wheel. Cleaningand dressing the grinding wheel improves thequality of the grind. See Page 13 for moreinformation.


FIG. 8Lock Lever

Vertical Cam LeverWheel Guard Lock Screw

FIG. 9

HandwheelHorizontal Adjustment

Horizontal AdjustmentScale

Diamond Dresser

9


FIXED BEDKNIFE SUPPORT (FIG. 10)The bedknife and bedbar is held in position by twomagnets and centers. The left side magnet andcenter position is fixed.

ADJUSTABLE BEDKNIFE SUPPORT (FIG. 11)The right side magnet and center is adjustable tomatch bedknife width.

Right Hand Adjustable Support Lock KnobLocks the right magnet and center assembly inposition on the tooling bar slide. See FIG. 11

TOOLING ALIGNMENT ADJUSTER (FIG. 12)Left HandAdjustment HandwheelAdjusts the left side of the tooling assembly. Allowingthe tooling assembly and bedknife to be align to thegrinding head. This ensures maximum life from thebedknifes.

BEDKNIFE GAGE (FIG. 10)On the outside of each magnet is a retractablebedknife gage. These gages are used to align thebedknife to the grinding wheel carriage travel.See page 16 for detailed explanation of use.

TOOLING ROTATION (FIG. 12)

To achieve the angles as described on page 10 and11, the Neary 277 Bedknife grinder has a movabletooling bar with an angle indicator and lock. FIG. 12shows the angle pointer and decal. The tooling baris moved from front face to top face with a lever andlock handle on the left inside of the grinder.

Bedknife Gage FIG. 10

FIG. 11

FIG. 12

Tooling Handle Lever

Locking Handle

Angle Pointer

Centers

Magnet

Bedknife GageMagnet Center

Lock knob

10

WHEN TO SHARPEN THE BEDKNIFE

NOTE: To fully sharpen a reel mower, you need togrind the reel blades (using a Reel Grinder) andreshape the cutting edge of the bedknife (using theNeary 277 Bedknife Grinder).

NOTE: New bedknives should be ground beforebeing put into use. New bedknives deform and moveto match the shape of the bedbar at the time ofinstallation and therefore MUST be ground to astraight surface after installation.

When the grass is not being cut cleanly, or the cutends of the grass appear torn or ragged, the edgesof the reel blade and bedknife have become roundedand need sharpening. See FIG. 13A. The purpose ofsharpening is to restore the sharp edges to the reeland bedknife as well as to return the mowing unit tothe manufacturers recommended configuration.See page 64 for manufactures specifications.

BEDKNIFE GRINDING ANGLESThe bedknife has two faces that normally need to beground, the top face and the front face (on somemodels, the front face may be curved and not needgrinding.)

The proper grinding angles for the two faces will varydepending on the reel manufacturer. Always followthe manufacturer's recommended specificationsfor bedknife angles.

Typically, however:

There will be a +4 to -10 degrees clearanceangle ground on the top face. It will usuallybe measured relative to the bedknifemounting surface. See FIG. 14A.There will be a 0-30 degrees clearance angleground on the front face. It will usually bemeasured relative to a line perpendicular tothe bedknife mounting surface. See FIG. 14B.


FIG. 14

FIG. 13

+4 TO - 10OO

O0 - 30o

11

FIG. 15

TERMS:Bedknife - the stationary blade in a reel mower.Bedknife Support or bedbar - the bedknife is mounted to this frame member with screws or rivets.Top Face - the horizontal, ground surface of the bedknife.Front Relief Angle - the angle between vertical and the manufacturer’s recommended sharpening angle.Top Relief Angle - the angle between horizontal and the manufacturer’s recommended

sharpening angle.

Recommended Face & Top Angles

Manufacturers recommend the bedknife relief angles should always be maintained to originalmanufacturer’s specifications. Neary Technologies has compiled these angles in a chart below.Angles vary depending on the manufacturer and model. We have included many of the popular modelsin the chart. If your model is not listed, consult your bedknife manufactures manual for therecommended sharpening angles.

Some units do not have the front face ground. For example: Some Toro units (such as the 70” Pro)have a “stellite” hard coated surface. The Toro Turf Pro 84 has a factory ground front face. Consult thebedknife manufacturer when in doubt as to grinding the front face.

12


FIG. 16

MOUNTING A GRINDING WHEEL

To replace the grinding wheel: See FIG. 16.1. First turn off the power by pushing in the Emergency

Stop button.

2. Unscrew the mounting flange that holds thegrinding wheel, using the grinding wheel wrenchsupplied with the grinder.NOTE: The Lock Flange has a left handedthread, hold the wheel and turn the wrenchclockwise while looking at the Lock Flange.

3. Remove the old wheel and install the new one.

4. Screw on the flange finger tight, then tightenapproximately 1/8 turn further with the wrench.It will self-tighten when motor is turned on.

IF THE WHEEL FLANGE ISOVERTIGHTENED, THE GRINDINGWHEEL MAY CRACK AND FLY APART.

GRINDING WHEELS AVAILABLE FOR 277 BEDKNIFE GRINDER

WHEEL PART NO. COLOR/DESCRIPTION/SIZE GRIT

3700060 White/red (ruby) flare-cup wheel 606/3-1/4 x 2 0.627 inch bore, vitrified ruby

3700062 White flare-cup wheel, 466/ 3-1/4 x 2 0.627 inch bore, vitrified

3700268 White/red (ruby) straight-cup wheel, 606 x 2 x 0.627 inch bore, vitrified ruby

3700411 White straight-cup wheel, 46 Standard Grinding6 x 2 x 1.25 inch bore, vitrified Wheel

3700670 Borazon straight - cup wheel, 60 For normal or extra6 x 1-1/2 x 0.625 inch bore hardened bedknife.

3700696 Borazon straight-cup wheel, 120 For normal or extra6 x 1-1/2 x 0.625 inch bore hardened bedknife.

5. After you install a new or different wheel, it is recommended that you dress it before grinding. Dressing trues the grinding surface of the wheel and removes the hard glaze sometime remaining from the manufacturing process. This dressing, properly prepares the wheel for grinding. See Page 13.

13

DRESSING THE GRINDING WHEELDress the grinding wheel whenever there is any glazing.Glazing is the buildup of stone dust, grinding grit, and coolanton the face of the wheel. For best results, also dress thewheel before making the final grind.

REFER ALSO TO THE "SAFETY RULESWHEN GRINDING" ON PAGE 3.


FIG. 18 Dresser locked

DRESSER

FIG. 19 Dresser unlocked

[19mm]

FIG. 17

Replacing the WheelA new vitrified grinding wheel is 2" [51 mm] deep. Whenit wears down to a depth of 0.75" [19 mm], it should bereplaced. See FIG. 20.

With the wheel turning, lift the dresser movement arm off its holder and push it forward. Swing the dresseraround to the grinding face of the wheel and turn the adjuster ring until the diamond point JUST touches thewheel. See FIG. 19. When done, rotate handle clockwise against the lock bracket before pulling back andreplace the dresser movement arm in the holder. See FIG. 18.

If the dresser is adjusted too far into the wheel, the area supporting the diamond will be ground and thediamond may come loose. Adjust so the diamond tip just touches the wheel.

NOTE: Excessive dressing will shorten the life of the wheel. To littledressing will inhibit proper grinding.

DRESSER MOVEMENT ARM LOCK BRACKET

Adjusting ring

FIG. 20

For dressing, always move the grinding head to the righthand side of the machine (fig. 17) so you are clear of thebedknife.

14


FIG. 22

FIG. 21

ALWAYS READ THE MATERIALSAFETY DATA SHEET (MSDS) FORTHE COOLANT YOU ARE USING.BELOW ARE WARNINGS THATAPPLY TO MOST COOLANTS.

AVOID CONTACT OF COOLANT WITHEYES: IT WILL CAUSE EYEIRRITATION. WEAR FACE SHIELD ORGOGGLES WHEN HANDLINGCONCENTRATE. IN CASE OFCONTACT, FLUSH EYES WITHWATER FOR 15 MINUTES ANDCONTACT A PHYSICIAN.

AVOID BREATHING MISTS. PROVIDELOCAL VENTILATION. KEEPCONCENTRATED BOTTLE CLOSEDWHEN NOT IN USE.

CONTINUED CONTACT OFCONCENTRATE ON SKIN MAYCAUSE IRRITATION. WASH WITHSOAP AND WATER AFTER CONTACT.

DO NOT TAKE INTERNALLY. IFINGESTED, CONSULT PHYSICIANAND DO NOT INDUCE VOMITING.

(HAZARD POTENTIAL APPLIES TOCONCENTRATE, AND IS LESS ATNORMAL USE DILUTION.)

Mixing the CoolantMix Part No. 80340 Coolant in a separate container, at aratio of 50 parts water to 1 part concentrate. Refer alsoto the label on the Coolant container. If the coolant trayis empty, this will take about 6.5 gallons of water andone pint of concentrate [24.6 liters of water, and 0.5 literof concentrate].

THE COOLANT RATIO AS SPECIFIED MUST BEUSED. TO HIGH A CONCENTRATION ORLOW A CONCENTRATION WILL CAUSECORROSION AND PERFORMANCEPROBLEMS.

USING FLOOD COOLANTFor quality grinding, we highly recommend using floodcoolant to prevent heat buildup on the knife edge.

IF YOU DRY-GRIND, NEVER ALLOW THEBEDKNIFE EDGE TO CHANGE COLOR OR YOUMAY LOSE THE TEMPER IN THE KNIFE EDGE.

Using the CoolantDirect the nozzle so the coolant sprays ontothe bedknife face being ground. FIG. 21 or 22.Some coolant will then also be deflected ontothe grinding wheel. Adjust the flow valve sothere is a steady stream of coolant. Avoid astronger flow than needed, excessive coolantdoesn't cool more, and increases splattering.

Fluid Level in Coolant TankCheck the fluid level in the Coolant tray daily toavoid running out while grinding. Keep thecoolant level between .25 - .50 inches [6-12mm] above the top of the coolant sump.The pump inlet must always be completelysubmerged in water. Never add plain water tothe coolant when the level is low. Always addwater and concentrate in the correctproportions. It is recommended to pre-mixcoolant and water in a separate container forthis purpose.

15


MOUNTING A BEDKNIFE FOR GRINDING

Inspect and Clean the BedknifeInspect the bedknife for damage (cracks, warping, bushing wear, excessive bedknife wear). Replace orrepair if necessary, see the mowing unit manufacturer's manual. Thoroughly clean the bedknife, especiallyon the bottom where the magnets will attach.

It is recommended that you thoroughly wire brush the bottom of the bedknife before mounting.

Prepare the Machine for Mounting the BedknifePivot the tooling assembly to the horizontal position (Front face grinding position) and set the bedknife angleto 0 front face angle. Position the grinding head all the way to the right, then crank the carriage back (awayfrom the magnets) to gain clearance for the bedknife. Always wipe any grindings, dirt, etc. from the magnetsand the tooling bar right side slide area before mounting the bedknife.

USING A FLARE CUP WHEELFOR ADDED CLEARANCEThe shape of some bed bars requires using an optionalflare-cup grinding wheel to clear the end supports.See FIG. 23.

Flare-cup wheels can be ordered in several 6" [150 mm]diameter versions. For most applications, the 6" vitrifiedstraight cupped wheel is used. However, if the endmounting flanges of the bedknife are more than 2" [50 mm]high or near the front face of the knife, you may need theoptional 6" flared cup wheel.

For Part Numbers and descriptions of all available grindingwheels, refer to the Grinding Wheels list on Page 12.

ROTATING THE WHEEL GUARDSome bedknives and bedbars have mounting ears so closeto the bedknife top face that there is no clearance for thewheel guard. For these applications, generally a flared cupgrinding wheel should be used and the grinding wheel guardcan be loosened and rotated so the clearance area of theguard allows the bedknife to be ground without interference.When completed, ALWAYS reposition the guard to itsnormal position with the clearance notch down. See FIG. 23

FOR OPERATOR SAFETY, THE GRINDINGWHEEL GUARD MUST BE USED WITH THECLEARANCE AREA UP ONLY WHENREQUIRED FOR BEDBAR CLEARANCE.

FIG. 23

FLARED-CUP WHEEL

WHEEL GUARD LOCK KNOB

USE OF COOLANT OTHER THAN FACTORY SUPPLIEDCOOLANT CONCENTRATE IS NOT RECOMMENDED.ALTENATIVE COOLANT CONCENTRATES MAY CAUSECORROSION AND GRINDING PROBLEMS.

16

MOUNTING A BEDKNIFE FOR GRINDING(Continued)

Mount the Bedknife1. Pull both gage tips forward and rotate the gage intoposition, straight up. Loosen the lock knob and on theright side magnet and center assembly. See FIG. 24.Set the bedknife / bedbar assembly to be ground on themagnets. Move the right side magnet assembly untilthe alignment gage tips are at both ends of th bedknife, then tighten the right side magnet lock knobenough to secure the magnet. When tightening, makecertain the mount is tight to the tooling bar at top andfront.

2. Position the bedknife so the unworn tips on a usedbedknives or the ends of a new bedknife are on thegage tips. See FIG. 25 Pull the bedknife forward firmlyagainst the gage tips. Install the centers by looseningthe arms lock handles only enough to slide the armsand loosening the center lock knobs. Position the centerinto a bedknife hole and tighten the center lock knoband the arm lock handle on both sides. See FIG.25 &26. Turn down and park both alignment gage tips.

BEDKNIVES WITH DUAL CUTTING EDGES

Some mowing unit manufacturers and some aftermarket bedknife manufacturers make a bedknife withDual Cutting Edges as shown in FIG. 28.

Because of the two radiused surfaces that thesebedknives present to the magnets there is minimalholding force.

Therefore, to achieve a solid hold with the magnets, youmust file the bottom side of the bedknife with a flatbastard file as shown in Fig 27.

You must file with a uniform stroke across both radius.File until you have developed flats on the radius that area minimum of 3/32 (.09) [2.3mm] wide and uniform inwidth for the length of the magnet on each end of thebedknife.


FIG. 28.

FIG. 24

FIG. 27

Right HandAdjustable supportLock Knob

Make sure tight,top and front

The center should not load the bedbar in anydirection and should be tightened into thebedbar only enough to hold the bedbar rigid.

FIG. 25

FIG. 26

17

OPERATING INSTRUCTIONS (Continued)

GRINDING WHEEL AT LEFT END OF BEDKNIFE

FIG. 29

GRINDING WHEEL AT RIGHT END OF BEDKNIFE

FIG. 30

BEDKNIFE ALIGNMENTWith this alignment you are aligning the bedknife facesto the grinding head by moving the bedknife support.

End Nib

Alignment is accomplished by touching thegrinding wheel to the bedknife.

With the bedknife / bedbar assembly mounted perprocedure on page 15-16 and in the front facegrinding position with the front face angle set to themower manufacturers factory specification, movethe grinding head to the right end of the bedknife.Now adjust the carriage infeed handwheel until thewheel just touches the bedknife at the end nib ofthe knife face on a used bedknife, or the full knifeface on a new bedknife. On used bedknives, if youdo not want to grind back to factory specifications,but want to grind to match the worn bedknife, thentouch the grinding wheel inside the end nib. SeeFIG. 29.

Next, move the grinding head to the left end of thebedknife. Now without moving the grinding headinfeed, adjust the tooling bar left side adjuster untilthe grinding wheel just touches the bedknife end nibor the knife face on a used bedknife, or the full knifeface on a new bedknife. Again, on a used bedknife ifyou do not want to grind back to factoryspecifications, but want to grind to match the wornbedknife, touch the grinding wheel inside the endnib. See FIG. 30. Because when you adjust the leftside, the right side also moves a small amount, youshould go to the right and left sides several times toverify that you just contact the knife at both ends.This can be done while grinding the knife.

NOTE: These adjustments are done at the sidehandwheel, NOT at the infeed handwheel on thegrinding head.

Grind the front face per the instructions on Page 18and 19.

Then, rotate the tooling bar to the Top Face positionand repeat the above procedure to grind the TopFace. Grind the top face per the instructions onPage 20-22.

18

GRINDING THE FRONT FACE

NOTE: The following instructions presume that you havealready studied all previous sections of this manual.NOTE: On some mower bedknives, the front face iscurved and therefore may not have to be sharpened.

Position the Bedknife for Front-Face Grinding(See FIG. 31)Loosen the left side tooling rotate lock handle. Rotate thetooling assembly to the front face position (down) and setthe front face angle to the mower manufacturers factoryspecification. Tighten the tooling rotate lock handle.

Check Clearances and Set Traverse LimitsPosition the grinding head so that the grinding wheel justtouches the front face of the bedknife. With the verticalcam and lock lever, adjust the grinding head so the grindingwheel rim extends 1/2" [12mm] or as much as possibleabove the front face to be ground. See FIG. 32.

IF THE GRINDING WHEEL RIM DOES NOTEXTEND OVER THE BEDKNIFE FACE, IT WILLGRIND UNEVENLY AND CAUSE GROOVESACROSS THE SURFACE OF THE BEDKNIFE.

Check for interference:1. Back out the grinding head so the wheel no longer

touches the front face of the bedknife.2. Slide the left and right proximity switches to the far

ends of the rail.3. Set the TRAVERSE speed potentiometer slow. Set

the CARRIAGE TRAVERSE switch ON. Traversethe carriage to the left until the contact area of thegrinding wheel is about 1" beyond the area to beground on the bedknife, then turn the traversepotentiometer to zero. Be prepared to STOP thetraverse earlier if there is any interferencebetween the grinding wheel and the bedbar.

With the carriage still in the position determined in Step 3above, slide the left proximity switch in until its LED lights.

Traverse back to the right until the grinding wheel reachesthe point where it covers the entire area to be ground andgoes past that point by 1" [25 mm] or more if possible.Then set the right proximity switch in the same manner.

NOTE: The area of the grinding wheel which contacts thebedknife is on the left side of the wheel. When grinding theleft end of the bedknife, the area of the wheel which doesn'tcontact the bedknife will still be over the bedknife. See FIG.33. When you go to the right end of the Grinder, the wheeltraverses completely off the bedknife. Infeed the grindingwheel until it very lightly touches the bedknife on the leftside. Now traverse to the right end of the bedknife toassure that the right side is not closer to the grindingwheel. Back the wheel out if necessary until you cantraverse full length with a very light touch at the closestpoint.

FIG. 31


FIG. 33

FIG. 32vertical cam lever

lock lever

19

GRINDING THE FRONT FACE (Continued)

Grind the BedknifeWhen you are satisfied with the grinder head travel, begin grinding:

REFER TO THE "SAFETY RULES WHEN GRINDING" ON PAGE 3.

NOTE: During the grinding process, watch the spark pattern for the full length of grind, the sparksshould look equal for the full length of grind.

1. Set the GRINDING WHEEL switch to ON.

2. Set the COOLANT PUMP switch to ON. Check the nozzle is directing coolant onto the bedknife. FIG. 22.

3. Set the TRAVERSE speed Potentiometer at about 15 to 20.

NOTE: If an excessive amount of metal stock will have to be removed on one end of the bedknife, recheck your setup first and then the straightness of the bedknife. If it is bowed or twisted, replace it.

4. Set the carriage traverse switch ON. With the horizontal infeed handwheel, crank the grinding head in (clockwise) until the wheel is removing metal lightly from the bedknife. It is recommended to take off about .002 to .003" [.05 to .075 mm] per pass.

NOTE: The horizontal adjustment dial is calibrated in .002" [.05 mm] increments.

5. Continue grinding the bedknife in this manner until you are satisfied with the front face grind. Dress the wheel when necessary. (see "Dressing the Grinding Wheel" on Page 13)

6. Dress the wheel before the final spark out grind. For spark out procedure, see the top of page 22.

By partially grinding both surfaces, the top face and the front face, as shown in FIG. 34, you will resharpen aused bedknife with the least metal removal. FIG. 34 also shows how much stock would be removed if youground the top face surface until sharp. Partially grinding both surfaces is the preferred method for lifeutilization of the bedknife.

FIG. 34

SHUT OFF THE COOLANT PUMP SWITCH BEFORE YOU SHUT OFF THE GRINDINGWHEEL, TO ALLOW THE WHEEL TO SPIN DRY. IF THE WHEEL RETAINS TOO MUCHCOOLANT, IT WILL BE UNBALANCED WHEN YOU AGAIN TURN ON THE GRINDINGMOTOR.


20

GRINDING THE TOP FACENOTE: The following instructions presume that youhave already studied all previous sections of thismanual.

Position the Bedknife for Top-Face Grinding(See FIG. 35 )When rotating from front face grinding to top facegrinding, the grinding head must be backed out three fullturns. Rotate the tooling assembly to the top faceposition (up) and set the top face angle to the mowermanufacturers factory specifications.


FIG. 35

FIG. 36

Check Clearances and Set Traverse LimitsPosition the grinding head so that the grinding wheel justtouches the top face of the bedknife. Check to see if therim of the grinding wheel is extended 1/2" [50mm] abovethe top face of the bedknife. If you have previously groundthe front face it most often will be correct. If not, with thevertical cam and lock lever, adjust the grinding head. SeeFig. 36. If the shape of the bedbar interferes with thewheel guard or grinding wheel you will need to makeadjustments.See page 15.

IF THE GRINDING WHEEL RIM DOES NOTEXTEND OVER THE BEDKNIFE FACE, IT WILLGRIND UNEVENLY AND CAUSE GROOVESACROSS THE SURFACE OF THE BEDKNIFE.

Check for interference:1. Back out the grinding head so the wheel no longer

touches the top face of the bedknife.

2. If you have just ground the front face the travel limitshould still be correct, but you should still verify nointerferences as described below. If you did not grindthe front face, follow the full procedure listed below.Slide the left and right proximity switches to the farends of the rail.

3. Set the TRAVERSE speed potentiometer at 10. Set the CARRIAGE TRAVERSE switch ON. Traverse thecarriage to the left until the contact area of the grindingwheel is about 1" beyond the area to be ground on thebedknife, then turn the traverse potentiometer to zero.Be prepared to STOP the traverse earlier if there is anyinterference between the grinding wheel and the bedbar.

With the carriage still in the position determined in Step 3above, slide the left proximity switch in until its LED lights.

Lock Lever

Vertical Cam Lever

21


FIG. 37

GRINDING THE TOP FACE (Continued)

Traverse back to the right until the grinding wheelreaches the point where it covers the entire area to beground and goes past that point by 1" [25 mm] or more ifpossible. Then set the right proximity switch in the samemanner.

NOTE: The area of the grinding wheel which contactsthe bedknife is on the left side of the wheel. Whengrinding the left end of the bedknife, the area of the wheelwhich doesn't contact the bedknife will still be over thebedknife. See FIG. 37. When you go to the right end ofthe Grinder, the wheel traverses completely off thebedknife.

Infeed the grinding wheel until it very lightly touches thebedknife on the left side. Now traverse to the right endof the bedknife to assure that the right side is notcloser to the grinding wheel. Back the wheel out ifnecessary until you can traverse full length with a verylight touch at the closest point.

Grind the BedknifeAlign the bedknife per the procedure on Page 17.

NOTE: Top face alignment is fully independent of the front face alignment and MUST be done.

When you are satisfied with the grinding head travel and alignment begin grinding:

REFER ALSO TO THE "SAFETY RULES WHEN GRINDING" ON PAGE 3.

NOTE: At this point you won't know the condition of the grinding wheel after the previous job. Always dress the wheel before grinding. See Page 13.

1. Set the GRINDING WHEEL switch to ON.

2. Set the COOLANT PUMP switch at ON, and check that the nozzle is directing coolant onto the bedknife.See FIG. 37.

3. Set the TRAVERSE speed potentiometer at about 15 to 20.

NOTE: If an excessive amount of metal stock will have to be removed on one end, recheck your setup first and then check the straightness of the bedknife. If it is bowed or twisted, replace it.

4. Set the carriage traverse switch at on. With the horizontal infeed handwheel, crank the head in (clockwise)until the grinding wheel is removing metal lightly from the bedknife. It is recommended to take off about .002 to .003" [.05 to .075 mm] per pass during the rough grind.

NOTE: The horizontal adjustment dial is calibrated in .002" [.05 mm] increments.

5. Continue grinding the bedknife in this manner until you are satisfied with the top face grind. Dress the wheel when necessary. (See dressing the Grinding Wheel" on page 13). During the grinding process, watch the spark pattern for the full length of grind, the sparks should look equal for the full length of grind.

6. Dress the wheel before making the final spark out grind.

22

GRINDING THE TOP FACE (Continued)

On the spark out passes, crank the grinding head in (clockwise) only about .001" [.025 mm] and then let thegrinding wheel spark out. For sparking out, always traverse the grinding head 10 to 20 passes withoutcranking the grinding head in further. To get the finest top-face grind, set the TRAVERSE knob at slow speedfor this final grinding sparkout. This process improves the surface finish of the grind and improves the grindquality.

NOTE: What you are looking for is a "near sparkout" - about a 99% reduction in grinding spark from a normal grind. Don't continue sparking out until you have no sparks, because this could be an extremely long time.

SHUT OFF THE COOLANT PUMP SWITCH BEFORE YOU SHUT OFF THE GRINDINGWHEEL. THIS WILL ALLOW THE WHEEL TO SPIN DRY. IF THE WHEEL RETAINS TOOMUCH COOLANT, IT WILL BE UNBALANCED WHEN YOU TURN ON THE GRINDINGMOTOR AGAIN.

REMOVING THE BEDKNIFETo remove the bedknife, rotate the tooling assembly to the front face grinding position (down). Remove theright hand center from the bedbar by backing the center back as far as necessary. DO NOT loosen the armlock; grasp the bedknife and pull it off the magnets. If the next bedknife to be ground is the same type and sizeas the previous, simply mount it and proceed with verifying mounting and proceed with new alignment. If thenext bedknife to be ground is a different type or size, follow the full installation procedure.


23

SERVICE DATA

SKILL AND TRAINING REQUIRED FOR SERVICING

This Service Manual is designed for technicians who have the necessary mechanical and electricalknowledge and skills to reliably test and repair the 277 Bedknife Grinder. For those without the background,service can be arranged through your local distributor.

This section presumes that you are already familiar with the normal operation of the Grinder. If not, youshould read the front of this manual, or do the servicing in conjunction with someone who is familiar with itsoperation.

Persons without the necessary knowledge and skills should not remove the control box cover or attempt anyinternal troubleshooting, adjustments, or parts replacement.

If you have questions not answered in this manual, please call your distributor. They will contact themanufacturer if necessary.

Throughout this manual we refer to torquerequirements as "firmly tighten" or the like. For morespecific torque values, refer to the informationbelow.

Bolts Going Into a Nut, or Into a Thread Hole inSteel.Refer to the table at the right.

Bolts Going Into a Thread Hole In AluminumUse the Grade 2 values in the table at the right.

Socket-Head Screws Going Into a Nut or SteelUse the Grade 8 values in the table at the right.

Machine ScrewsNo. 6 screws: 11 in.- lbs (0.125kg - m)No. 8 screws: 20 in. - lbs (0.23 kg - m)No. 10 screws: 32 in. - lbs (0.37 kg - m)

TORQUE REQUIREMENTS

GRADE 2 GRADE 5 GRADE 8

SMOOTH 3 MARKS 6 MARKS HEAD on HEAD on HEAD

1/4 In. 6 ft-lbs 9 ft-lbs 13 ft-lbs thread (0.8 kg-m) (1.25 kg-m) (1.8 kg-m)





24

PACKING LIST: Upon arrival make sure that all parts are included in shipment.

Feature

Partially Enclosed CabinetMagnetic Mount for Bed KnifeCenters for mounting the Bed KnifeInfeed, Manual ControlTravel, Automatic Variable SpeedFlood Coolant SystemGrinding Head Mounted Diamond DresserBuilt in Angle Protractor

27550 Operator’s ManualPint - Coolant ConcentrateGrinding Wheel Wrench

3707393 Transformer Kit for 230 Volts, 50/60 Hz - OptionalExtra Grinding Wheels - Optional6100501 Magnetic Base Dial Indicator - Optional

If items are MISSING from the shipment, notify your distributor who will contact a Service Representative.

SITE REQUIREMENTS:√ Indoors√ Dry√ Reasonably level Concrete floor√ Good Lighting√ 115 Volts, 50/60 Hertz, 15 Amp outlet (Transformer Kit 3707393 available to convert to 230 VAC).√ Adequate access to the front of the machine for the operator.

25

ASSEMBLY INSTRUCTIONS

Remove the sides, front, and back of the crate.Remove the plastic bag, shrink wrap and bubblewrap. Remove the metal clips that secure thegrinder to the crate base. With a fork lift, raise thegrinder from the wood base and set it in its finalposition. See FIG. 38 and 39. Remove shippingstraps.

THE UNIT WEIGHS750 LBS. (340 kg). TOLIFT, USE POWEREQUIPMENT.

POSITION BASE

The 277 Bedknife Grinder will require an operatingarea of about 91" W x 72" D x 87" H (231 x 183 x 221cm). The machine operator will operate the unit fromthe front of the machine. Position the base to allowsufficient operating room in front and right side of themachine. See FIG. 38 and 39.

The base should be placed on a relatively level con-crete floor, with ample ceiling height to allow for theinstallation of the unit. Do not place the unit acrosstwo concrete slab seams or across a large crack.

FIG. 38

FIG. 39

26

ASSEMBLY (Continued)

ASSEMBLE THE FLOOD COOLANT SYSTEM

1. The flood coolant system has been fully assembled at the factory. The only requirement is to install the coolant.

2. Follow the coolant miximg proceedure on page 14 of this manual.

3. After the mixed coolant has been added, your coolant system is ready to operate. When you start the coolant pump for the first time you must adjust the coolant flow using the valve at the grinding head.

FIG. 40

27

ASSEMBLY INSTRUCTIONS (Continued)

FIG. 41

APPLY POWER

BEFORE YOU APPLY POWER TO THEGRINDER, REFER TO THE "IMPORTANTGROUNDING INSTRUCTIONS".

115 Volt Model Only. Plug the control box power cord into a standard115V AC 15-amp grounded receptacle. See FIG. 41.

220 Volt Model Only. For 220 Volt Applications order Part No.2770952, which includes a 220 to 110 Volt Step Down Transformer.

IT IS RECOMMENDED THAT THIS GRINDER HAS ITS OWNPERMANENT POWER CONNECTION FROM THE POWERDISTRIBUTION PANEL, WITH NO OTHER MAJOR POWERDRAW EQUIPMENT ON THE SAME LINE.

PROPER GROUNDING OF THE RECEPTACLEGROUND IN YOUR BUILDING MUST BE VERIFIED.IMPROPER GROUNDING IN YOUR BUILDING MAYCAUSE THE GRINDER TO MALFUNCTION.

FOR 15 AMP RATED LARGE MACHINES BUILDING WIRING

For 0 to 30 Feet ( 0 to 9 m) from panel to receptacle = Use 14 Ga. (2.5 mm) Wire.For 30 to 50 Feet (9 to 15 m) from panel to receptacle = Use 12 Ga. (4.0mm ) Wire.For 50 to 80 Feet (15 to 24 m) from panel to receptacle = Use 10 Ga. (6.0 mm) Wire.For 80 to 140 Feet (24 to 42 m) from panel to receptacle = Use 8 Ga. (10.0 mm) Wire.

For 0 to 15 Meters from panel to receptacle = Use 2.5mm Wire.For 15 to 42 Meters from panel to receptacle = Use 4.0mm Wire.

The grinder is equipped with ahigh-low voltage relay which isfactory preset at 100-140 VAC. Ifthe power supply line does notdeliver 100-140 VAC power underload, the relay will open and tripout the starter. If this occurs, yourpower supply line is incorrrect andmust be correct beforeproceeding further with thegrinder.

IT IS REQUIRED THAT THE POWER DELIVERED TO THISGRINDER IS 115 VAC & 15 AMPS. THE TOLERANCE ONTHIS POWER REQUIREMENT IS +/- 5%. THEREFORE THEMINIMUM VOLTAGE REQUIREMENT IS 109VAC WITH 15AMPS. VOLTAGE MUST BE CHECKED WITH ALLEQUIPMENT UNDER LOAD (OPERATING) ON THECIRCUIT.

DO NOT OPERATE THIS GRINDER WITH AN EXTENSIONCORD.

DO NOT OPERATE THIS GRINDER ON A GROUND FAULTINTERUPTER (GFI) CIRCUIT. THE (GFI) WILL TRIPCONSTANTLY.

When installing the grinder, the following guidelines should be used toestablish the wire size between the power panel in your building and thegrinder receptacle. Note that the wiring in your building must be per codebetween main power panels and sub panels.

28

FOR 220 V 50/60HzapplicationsProduct No. 2770952should be ordered.

2770952 includes a 2 KVA220 Volt Step Down to 110volt 50/60 Hz transformerwhich is prewired.

The wiring diagram is shownin FIG. 42.

The power cord has noconnector.

A connector which isappropriate for your localityand 220 volt, 8 ampapplication should beinstalled.

ASSEMBLY INSTRUCTIONS (Continued)

FIG. 42

IMPORTANT GROUNDING INSTRUCTIONS

In case of a malfunction or breakdown, grounding reduces the risk of electrical shock by providing a pathof least resistance for electrical current.

This Grinder has an electrical cord with an equipment grounding conductor and a grounding plug. Theplug must be plugged into a matching outlet that is properly installed and grounded according to all localor other appropriate electrical codes and ordinances.

Before plugging in the Grinder, make sure it will be connected to a supply circuit protected by aproperly sized circuit breaker or fuse. SEE SERIAL NUMBER PLATE FOR FULL LOAD AMP RATING OFYOUR MACHINE.

Never modify the plug provided with the machine. If it won't fit the outlet, have a proper outlet and circuitinstalled by a qualified electrician.

ALWAYS PROVIDE A PROPER ELECTRICAL GROUND FOR YOURMACHINE. AN IMPROPER CONNECTION CAN CAUSE A DANGEROUSELECTRICAL SHOCK. IF YOU ARE UNSURE OF THE PROPERELECTRICAL GROUNDING PROCEDURE, CONTACT A QUALIFIEDELECTRICIAN.

USE ONLY A QUALIFIEDELECTRICIAN TOCOMPLETE THEINSTALLATION.

29

MAINTENANCE

DAILY MAINTENANCE

On a daily basis, clean the grinder by wiping all areas down.On a daily basis, check coolant tray fluid level.On a daily basis, inspect the grinder for loose fasteners or components and tighten.Contact your company's Maintenance Department if damaged or defective parts are found.

DO NOT USE COMPRESSEDAIR TO CLEAN GRINDING DUST FROM THE GRINDER.

FIG. 43Wiper

PERIODIC MAINTENANCE

1. Clean the Traverse Rails by wiping down with WD-40 or equivalent on a weekly basis.

2. Replace the four foam rail wipers (FIG. 43) every 6 months of operation.

3. Clean the interior of the Coolant Tray as necessary and at least every 6 months.

4. Check the brushes on the auto traverse drive motor once every 36 months. Replace as necessary.

LUBRICATION

Linear BearingsDo the following at least every six months:

1. Thoroughly clean the carriage rails and shaft seals. Wipe the shafts and seals thoroughly with a clean rag.While cleaning, traverse the carriage several times to clean the full length of the rails.

2. Flood-spray shafts with WD-40 or an equivalent lubricant (do not use a Teflon-based lubricant) untillubricant drips off the shafts. Then run the carriage back and forth through its range of travel.

3. With a clean rag, wipe the excess lubricant from the shafts. Run the carriage back and forth through itsrange of travel, and wipe the shafts after each traverse. Repeat until the shafts feel dry.

IMPORTANT: If the machine will be shut down for more than one month, flood the shafts and otherappropriate parts with lubricant as outlined above, and leave the lubricant in place until the unit will beused again. Then repeat the above lubrication procedure before operating.

30

CLEANING AND MAINTENANCE GUIDELINES FOR POLYCARBONATEWINDOWS

Cleaning Instructions

DO NOT USE GASOLINEAdherence to regular and propercleaning procedures is recommendedto preserve appearance and performance.

Washing to Minimize ScratchingWash polycarbonate windows with a mild dish washing liquid detergent and lukewarm water, using a cleansoft sponge or a soft cloth. Rinse well with clean water. Dry thoroughly with a moist cellulose sponge toprevent water spots. Do not scrub or use brushes on these windows. Also, do not use butyl cellosolve indirect sunlight.Fresh paint splashes and grease can be removed easily before drying by rubbing lightly with a goodgrade of VM&P naphtha or isopropyl alcohol. Afterward, a warm final wash should be made, using a milddish washing liquid detergent solution and ending with a thorough rinsing with clean water.

Minimizing Hairline ScratchesScratches and minor abrasions can be minimized by using a mild automobile polish. Three suchproducts that tend to polish and fill scratches are Johnson paste Wax, Novus Plastic Polish #1 and #2,and Mirror Glaze plastic polish (M.G. M10). It is suggested that a test be made on a corner of thepolycarbonate window with the product selected following the polish manufacturer's instructions.

Some Important "DON'TS"♦ DO NOT use abrasive or highly alkaline cleaners on the polycarbonate windows.♦ Never scrape polycarbonate windows with squeegees, razor blades or other sharp

instruments.♦ Benzene, gasoline, acetone or carbon tetrachloride should NEVER be used on polycarbonate

windows.♦ DO NOT clean polycarbonate windows in hot sun or at elevated temperatures.

Graffiti Removal• Butyl cellosolve, (for removal of paints, marking pen inks, lipstick, etc.)• The use of masking tape, adhesive tape or lint removal tools works well for lifting off old

weathered paints.• To remove labels, stickers, etc., the use of kerosene, VM&P naphtha or petroleum spirits is

generally effective. When the solvent will not penetrate sticker material, apply heat (hairdryer) to soften the adhesive and promote removal.

GASOLINE SHOULD NOT BE USED!

MAINTENANCE

31

CARRIAGE LINEAR BEARING REPLACEMENT

STEP 1--Remove the four screws of one linear bearing and slide the linear bearing off the end of the carriage shaft.

STEP 2--Insert a new linear bearing onto the end of the carriage shaft with the tension adjustment screw pointing outward. See FIG. 44.

STEP 3--Adjust the tension screw of the linear bearing so when you radially rotate the linear bearing around the carriage shaft there should be no free play between the linear bearing and the carriage shaft.

NOTE: Tension is too tight if you feel a cogging action when you rotate the linear bearing around the shaft. This cogging is from the skidding of the bearing on the shaft and indicates the tension screw is to tight. Sliding the bearing block back and forth should be a smooth uniform motion.

Repeat Steps 1 through 3 with the other two linear bearings.

ADJUSTMENTS

FIG. 44

STEP 4--Slide linear bearing under carriage and attach with the four screws.

STEP 5--After all three linear bearings are secured to the carriage, check for correct bearing tension. The bearing tension is correct when you try to lift the carriage and can feel no carriage movement. If there is movement this means there is up and down free play. The most dependable method of checking free play is to use a magnetic base dial indicator attached to the traverse frame weldment and reading the vertical movement above each bearing. This movement should be within .001" [.03 mm]. When pulling the carriage in the traversing direction, there should be only approximately a three lbs force, with the belt clamp disengaged. To double check the assembly, slide the carriage from "end of travel" to "end of travel", it should have very uniform resistance through its full range.

SETTING THE BEARING TENSION CORRECTLY IS CRITICAL TO PROPER GRINDING.BEARINGS WHICH ARE TOO TIGHT OR TOO LOOSE WILL CAUSE POOR GRINDQUALITY. ALSO, BEARINGS WHICH ARE TOO TIGHT WILL HAVE SUBSTANTIALLYSHORTER LIVES AND MAY DAMAGE THE SHAFT.

32

ADJUSTMENTS (Continued)

TO ELIMINATE INFEED HANDWHEELBACKLASH

If there is backlash in the Grinder Head Infeedhandwheel (FIG. 45), there are two adjustmentpoints on each to check:

1. Washers behind the handwheel:

A. Loosen (about half a turn) the setscrewholding the handwheel to the shaft. This setscrewis accessed by removing the calibrationring setscrew and rotating the calibration ringto access the handwheel setscrew.

B. Tighten the hex lock nut which secures thehandwheel to 100 in. lbs. [1.15 kg-m], thenback off 1/2 turn.

C. Check for .015 in. [.04mm] gap betweenthe wave washer and the flat washer. See FIG.46. Re-adjust the hex lock nut if necessary.

D. Tighten the setscrew holding the handwheelto the shaft. Install and tighten the calibrationring setscrew.

2. Check the nylon ball tension on theadjustment shaft threads at the grinding headslide. See FIG. 45. When you turn thehandwheel there should be no free play in thehandwheel before the grinding head slidemoves. If there is free play, tighten thesetscrew that pushes the nylon ball againstthe acme thread of the adjustment shaft. Thenylon ball preloads the free play out of thethreaded joint between the adjustment shaftand the tooling bar slide block. Apply tensiononly enough to zero the free play.

DO NOT over tension the setscrew as theadjuster will be difficult to turn.

FIG. 45

Setscrew with nylon ball

FIG. 46

InfeedHandwheel

.015 in. gap

Wave andflat washers

HexNut

33


TO ELIMINATE ALIGNMENT ADJUSTMENTBACKLASH

If there is backlash in the alignment adjustmenthandwheels (FIG. 47), there are two adjustment pointsto check:

1. Check the nylon ball tension:

On the tooling bar adjustment block there is a nylonball / setscrew combination used to set thetension on the shaft slide block. See FIG. 47. Whenyou turn the handwheel there should not be any freeplay in the handwheel before the tooling bar blockslide moves. If there is free play, tighten the set screwthat pushes the nylon ball against the acme threadon the adjustment shaft. The nylon ball adjusts thefreeplay between the adjustment shaft and thetooling bar slide block. Apply tension only enoughto zero the freeplay. DO NOT over tension as theadjuster will be difficult to turn.

2. Washers behind the handwheel:A. Loosen (about half a turn) the setscrew holding the handwheel to the shaft.

B. Tighten the hex lock nut which secures the handwheel to 100 in. lbs. [1.15 kg-m], then

back off 1/2 turn.

C. Check for .015 in. [.04mm] gap between thewave washer and the flat washer. See FIG. 48.Readjust the hex lock nut if necessary.

D. Tighten the setscrew holding the handwheel tothe shaft.

FIG. 47

FIG. 48

Setscrew andNylon Ball

34

ADJUSTMENTS (CONTINUED)

TO ELIMINATE MOVEMENT IN THEDIAMOND DRESSER ADJUSTMENTCOLLAR

The adjustment collar on the diamond dresser(See FIG. 49) has a nylon ball and setscrewto put a holding drag on the diamond dressershaft. If the adjustment collar is moving toofreely, tighten the setscrew and put more loadon the nylon ball. If the adjustment collar isvery difficult to turn, loosen the setscrew andput less load on the nylon ball.

FIG. 49

Setscrew andNylon Ball

35

ADJUSTMENTS (CONTINUED)

ADJUSTING THE PRELOAD TENSION ONTHE SMALL GRINDING HEAD SLIDE VEEROLLERS

The small grinding head slide vee rollers arepositioned with two fixed on the left side and oneadjustable on the right side. To set the correctpreload on the right side adjuster, tighten thesetscrew in FIG. 50 until the spring is fullycompressed solid, then back off 1/2 turn.

FIG. 50

Tension AdjustSetscrew

TO ADJUST THE PROXIMITY SWITCHES

For the proximity switches to work properly adistance of 3/16 in. +/- 1/32 [4.75 mm +/- 0.75]must be maintained between the top of the switchand the actuator bracket on the bottom of thecarriage. See FIG. 51.To adjust the clearance, loosen one of the hexnut and tighten the other.

FIG. 51ProxSensorBracket

Prox3/16 ProxNut

36

ADJUSTMENT (Continued)

DO NOT OVERTIGHTEN.OVERTIGHTENING COULDDAMAGE THE BELT OR TRAVERSEDRIVE SYSTEM.

TRAVERSE CLAMP FORCE

If the traverse clamp is slipping during regularoperation it may be necessary to tighten the clamp.To tighten, loosen the jam nut and screw the tip out.Move the traverse belt out of the way and verify theclamped distance from the tip to the clamping block(shoe). See FIG. 53. Lock in place by tightening thejam nut against the clamp, being careful not to movethe tip.

Do not set the adjustment at less than .10”. The .10”setting allows slippage in a jam situation anddamage can occur if this adjustment is set to narrow.

CAUTION SHOULD BE USED ASADJUSTING THE TIP WILL AFFECTTHE SLIP LOAD AND COULDDAMAGE THE CLAMP TIP, BELT ORTRAVERSE DRIVE SYSTEM.

FIG. 52

FIG. 53

TRAVERSE BELT TENSION

To adjust the tension on the traverse belt tighten thescrews and nuts located at the left side of the traversebelt. Tighten nuts until the comprension springs mea-sure 3/4". See FIG. 52. If the springs are not tensionedequally, uneven loading on the traverse system maycause parts to fail.

3/4”

37

POTENTIOMETER ADJUSTMENTS TRAVERSE DRIVE CONTROL (TDC)

Min. Speed--Factory set at full (CCW) 8:30. Do not change this setting.

(Right Traverse) Forward Torque--Factory set at full (CW) 4:30. Do not change this setting.(Left Traverse) Reverse Torque--Factory set at full (CW) 4:30. Do not change this setting.

IR COMP--Factory set to 9:00. IR COMP is current (I) resistance (R) compensation (COMP).IR COMP adjusts the output voltage of the drive which balances load to motor RPM. Regulation of a traversemotor may be improved by slight adjustment of the IR COMP trim pot clockwise from its factory-set position.Overcompensation causes the motor to oscillate or to increase speed when fully loaded. If you reach such apoint, turn the IR COMP trim pot counterclockwise until the symptoms disappear.

Max. Speed--Set at 3:30 for maximum voltage of 90 Volts DC to the traverse motor. When voltage is above 90volts DC, the traverse motor will start to pulsate and not run smoothly.

(Right Traverse) Forward Acceleration--Factory set at full (CCW) 8:30. Do not change this setting.(Left Traverse) Reverse Acceleration--Factory set at full (CCW) 8:30. Do not change this setting.

(DB) Dead Band is the potentiometer setting for the 50 or 60 Hz cycle control. Factory set to 9:00, works forboth 50 and 60 Hz. Do not change this setting.

Calibrating the DWELL TIME rotary DIP switch adjusts the amount of time the process remains in the stopposition after a limit switch is actuated. The DWELL TIME range is adjustable from 0 - 4 seconds. A DIPswitch setting of 0 sets the DWELL TIME to 0 seconds, while a setting of 8 sets the DWELL TIME to 4seconds. Dwell time is preset to #2 setting for a 1 second dwell time when reversing at each end of stroke.

Diagnostic LED's indicate the function that is currently being performed:

* POWER indicates that ac power is being applied to the control.* FORWARD indicates that the process is running in the forward direction (traversing left).* REVERSE indicates that the process is running in the reverse direction (traversing right).* PROX 1 FWD LIMIT lights when the forward limit switch is actuated (left prox).* PROX 2 REV LIMIT lights when the reverse limit switch is actuated (right prox).* DWELL lights when the process remains stopped after a proximity switch is actuated.


3:00

12:0

0

6:00

9:00

PotentionmeterClock Orientation

38

SKILL AND TRAINING REQUIRED FOR ELECTRICAL SERVICINGThis Electrical Troubleshooting section is designed for technicians who have the necessary electricalknowledge and skills to reliably test and repair the electrical system. For those without that background,service can be arranged through your local distributor.

This manual presumes that you are already familiar with the normal operation of the Grinder. If not, you shouldread the operators section, or do the servicing in conjunction with someone who is familiar with its operation.

Persons without the necessary knowledge and skills should not remove the control box cover or attempt anyinternal troubleshooting, adjustments, or parts replacement.

If you have any question not answered in this manual, please call your distributor. They will contact themanufacturer if necessary.

AC Main Power Controls ................................................................................................. -40Grinding Motor Controls .................................................................................................. Page 41-42Coolant Pump Controls .................................................................................................. Page 42Traverse Drive Controls-w/prox....................................................................................... Page 43-47

ELECTRICAL TROUBLESHOOTING INDEX

All wires have a wire label at each end for troubleshooting. The wire label has a code which tells you wiringinformation. The wire label has a seven or eight position code. The first two or three digits are the wire number:01-99 or 123. The next three numbers or letters are the code for the component to which the wire attaches.Example: GMC for Grind Motor Control. The last two numbers or letters are the number of the terminal on thecomponent to which the wire attaches.

WIRE LABELS

ELECTRICAL TROUBLESHOOTING

39

ELECTRICAL TROUBLESHOOTING (Continued)

PROBLEM--AC Main Power Controls: no electrical power to control panel.Verify all wires shown on the wiring diagram on pages 68-69 are correct and pull on wire terminals withapproximately 3 lbs force to verify there are no loose terminal connections and/or no loose crimpsbetween wire and terminal. If problem persists, test as listed below.

Possible Cause Checkout Procedure

Emergency Stop Botton(ESS)is Depressed

You must push the SystemStart Switch (SSS) to getpower to control Panel

Main Power Cord is notplugged in

Guard doors must beclosed and ALL SwitchesMUST be turned OFFfor contactor to pull in.

Main 15 amp outlet circuitbreaker has tripped

No 120 Volts AC power toFilter (FTR)

No 120 Volts AC power outof Filter

No 120 Volts AC power toMain Circuit Breaker (MCB)

No 120 Volts AC power fromMain Circuit Breaker (MCB)

Machine worksYes--end troubleshootingNo--go to Step B. next

Machine worksYes--end troubleshootingNo--go to step C. next.

Machine worksYes--end troubleshootingNo--go to step D. next.

Machine worksYes--end troubleshootingNo--go to step E. next.

Machine worksYes--end troubleshootingNo--but light works in outlet--go toStep F. next.No--but light does not work in outlet.You must solve your power deliveryproblem independent of machine.

FTR "Line" Terminals for 120 Volts ACYes--Go to Step G. next.No--Replace Power Cord- 6059054

FTR "Load" Terminals for 120 Volts ACYes--Go to Step H. next.No--Replace Filter

MCB Bottom Terminal to TerminalBlock 4 (Blue) for 120 Volts ACYes--Go to Step I. next.No--Check wires & replace if needed.

MCB Top Terminal to Terminal Block 4(Blue) for 120 Volts ACYes--Go to Step J. next.No--Flip Switch on MCB to "ON" -Machine works-- end trouble shootingMachine does not work-- replace MCB

A. Pull Up on ESS Button

B. Listen for the Magnetic Starter(MAG) contacts to pull in with aclunk

C. Plug in main power cord

D. Close guard doors and turn offall switches.

E. Check circuit breaker in yourbuilding and reset if necessary.(Check wall outlet with a light to make sure it works)

F. Check for 120V at Cord intoFTR (Power Cord #32)

G. Check for 120V out of FTR

H. Check for 120V to MCB

I. Check for 120V to MCB

40


Checkout ProcedureNo 120 Volts ACpower to SecondaryCircuit Breaker(SCB) 6 Amp.

No 120 Volts ACpower fromSecondary CircuitBreaker (SCB) 6Amp.

120 Volts AC powernot delivered toTerminal Strip

Grinding MotorSwitch (GMS) notworking

Bad EmergencyStop Switch (ESS)

Bad System StartSwitch (SSS)

Low Voltage Relay(REL) not operating

Bad Main Contactor(MAG)

Possible CausesJ. Check for 120V to SCB

K. Check for 120V from SCB

L. Check for 120 Volts AC atterminal strip.

M. Check for 120 Volts AC atGMS Terminals 1

N. Check voltage after the(ESS) MAKE SURE SWITCHIS PULLED UP!

O. Hold in SSS and Checkvoltage after the (SSS)

P. Hold in SSS and Check volt-age at LVR. LVR must be in-stalled in 8-pin socket.

Q. Hold in SSS and Checkvoltage at MAG A1 & A2.

SCB (03SCB--) to nuetral (blue) terminal out of FTR for120VACYes--Go to Step K. next.No--Check wires & replace if needed.

SCB (67SCB--) to nuetral (blue) terminal out of FTR for120 VACYes-- Go to Step L. next.No--Flip Switch on SCB to "ON"-Machine works--end oftroubleshooting. Machine does not work--replace SCB

Terminal "11" on Terminal Strip 2 "07TB2-11" to TerminalBlock 4 (Blue) for 120 Volts ACYes--Go to Step M. next.No--Check wires #7 & #3, Check Jumper on TerminalBlocks 1-3.

Measure 120 volts AC from GMS Terminal 1 to Term Block4(Blue)Yes--Go to Step N. next. No--Flip Switch and checkagain-Works--Switch is upside down.Does not work-- Check wiring/Verify Continuity/ ReplaceSwitch

Measure 120 Volts AC from (ESS) term 2 to Term Block4(Blue)Yes--Go to Step O. nextNo--Check wire for continuity, then verify switchcontinuity. If bad replace ESS contactor (NC)

Measure 120 Volts AC from (SSS) term 3 to Term Block4(Blue)Yes--Go to Step P. nextNo--Check wire for continuity, then verify switchcontinuity. If bad replace SSS contactor (NO)

Measure 120 Volts AC from LVR term 8 to Term Block4(Blue)Yes--Go to Step Q. nextNo--Check for 120 Volts AC from LVR term 6 to term 7.Yes--Verify Continuity of term 1 to term 8 on LVR. ReplaceLVR if bad. No--Verify Continuity of Wires.

Measure 120 Volts AC from MAG Term A1 to Term A2Yes--MAG Should pull in with clunck, if not replace MAG.No--Verify Continuity of Wires.

41

Possible Cause

Guard Door is open.

Low Voltage Relay istripping.

Door Safety Switchis not aligned

Door Safety Switchis not workingproperly.

Measure 120 Volts AC at MAG term T3 toTerm Block 4(Blue) with E-Stop Pulled out.(do NOT press start button while checking.)Yes--Go to Step D. next.No--Verify continuity of wiring to MAG T3.

Disconnect Wire to MAG L3 and Measure120 Volts AC from MAG term L3 to TermBlock 4(Blue) Press and hold Green Startbutton to hold in MAG contacts whilechecking.Yes--Verify continuity of wiring from MAG L3No--Replace MAG.

PROBLEM--(MAG) turns on only with System Start Switch held in.

Checkout Procedure

A. Check voltage to MAG holdingcontact in.

B. Verify the magnetic starter (MAG)holding contact is working.

Possible Cause

No Power to MAGholding Contact

MAG holdingcontact has failed

Machine worksYes--end troubleshootingNo--go to Step B. next

Machine worksYes--end troubleshootingNo--go to Step C. next

Check aligment of door switch.Yes--end troubleshootingNo--Go to Step D. next.

Disconnect door safety switch cord atterminal 14 and 15 on Terminal Strip 1.Verify Conituity of switch with door closed.Yes--Reconnect Terminals and verifycontinuity of wires.No--Verify continuity of cord and replacecord or switch.

A. Close the guard doors.

B. Power delivered to the grinder isinadequate. Verify that adequatepower is delivered to the grinder.See page 27 of the manual. Fix theproblem with building power.

C. Check Alignment of Door SafetySwitch on guard door.

D. Verify Door Swith is Workingproperly.

Checkout Procedure

PROBLEM--Machine Shuts off when youturn on Grind motor switch.


42

PROBLEM-- Grinding motor not working.

Assuming (SSS) System Start Switch is on with 120 volts AC to control panel and all otherfunctions are working.

V e r i f y a l l w i r e s s h o w n o n t h e w i r i n g d i a g r a m o n p a g e s 68-69 are correct and pull on wireterminals with approximately 3lbs force to verify there are no loose terminal connectionsand/or no loose crimps between wire and terminal. If loose terminals are found, retighten andretest system. If problem persists, test as listed below.

Possible Cause

Grinding MotorSwitch (GMS) is noton

Guard door is notclosed

10 Amp CircuitBreaker (CB) istripped

Grind Motor Switch(GMS) not working

Grinding Motor Relaynot working

No Power to RelayContacts

A. Turn switch on

B. Close Front guard doors(and rear ramp - lift option)

C. Check 10 amp CB onfront of Control panel. Pressin if tripped.

D. Check for power to GMS

E. Check for power fromGMS

F. Check for power to relayCoil (Relay should clickwhen GMS is turned on.)

G. Verify Power to RelayContacts

Grinding Motor worksYes--end troubleshootingNo--go to Step B. next

Grinding Motor worksYes--end troubleshootingNo--go to Step C. next

Grinding Motor worksYes--end troubleshootingNo--go to Step D. next

GMS term 5 to Terminal Block 4 (Blue) for120 Volts ACYes--go to Step E. nextNo--With power off, check continuity ofwires to GMS.

With GMS ON , check GMS Term 6 toTerminal Block 4 (Blue) for 120 Volts AC.Yes--Go to Step F. nextNo--replace GMS

Check for 120 Volts (AC) from A1 to A2 ofGrinding motor Relay.Yes--If Relay does not pull in with click, re-place Relay, if it does Go to Step G. nextNo-- check continuity of wires to Grindingmotor Relay.

(REL) Term L1 to Term L2 for 120 Volts (AC)Yes--Go to Step H. nextNo--Check wires to REL Term L1 & L2


43

Checkout ProcedurePossible Cause

With relay pulled in (click) check(REL) Term T1 to Term T2 for 120Volts (AC)Yes--Go to Step I. nextNo--Replace Gringing Motor Relay

Check for 120 Volts (AC) from ter-minals TB2-6 to Terminal Block 4(Blue)Yes--Go to Step J. nextNo--Check circuit breaker for con-tinuity. Verify wiring and replace ifneeded.

Verify wiring at terminals 1, 2 & 3on Terminal Strip 1. Check TB1-1to TB1-2 for 120 Volts (AC).Yes-- Check terminals on motorcord. If tight replace motor.No-- Check wires from GrindingMotor Relay and Circuit Breaker toTerminal Strip 1.

Bad Contacts inGrinding motor Relay

Bad Circuit Breaker

Bad Grinding Motor

H. Verify power out of GrindingMotor Relay.

I. Verify Power out of CircuitBreaker.

J. Verify Power to Grinding mo-tor Cord.


Possible Cause

Coolant PumpSwitch (CPS) is noton.

Coolant flow valveclosed.

2 Amp CircuitBreaker (CB) istripped

2 Amp CircuitBreaker (CB) failed

Coolant PumpSwitch (CPS) notworking

Coolant Pump NotWorking

A. Turn switch

B. Open coolant flow valve.

C. Check 2 amp CB onfront of Control panel. Pressin if tripped.

D. Check power from CB

E. Check for power fromCPS

F. Check for power fromCPS

Coolant Pump worksYes--end troubleshootingNo--go to Step B. next

Coolant Pump worksYes--end troubleshootingNo--go to Step C. next

Coolant Pump worksYes--end troubleshootingNo--go to Step D. next

Measure 120 volt AC from both sides of2 amp CB to Terminal Block 4 (Blue)Yes--go to Step E. nextNo--With power off, check continuity of CB& wires to CB. Replace CB.

CPS Term 5 to Terminal Block 4 (Blue) for120 Volts ACYes--Go to Step F. nextNo--replace CPS

Measure 120 volt AC from TB1-4 to TB1-5.Yes--Replace Coolant Pump.

PROBLEM-- Coolant Pump not working.

44

PROBLEM--Traverse Drive not working.

Assuming (SSS) System Start Switch is on with 120 volts AC to control paneland all other functions are working.

Verify all wires shown on the wiring diagram on pages 68-69 are correct andpull on wire terminals with approximately 3lbs force to verify there are no looseterminal connections and/or no loose crimps between wire and terminal. Ifloose terminals are found, retighten and retest system. If problem persists,test as listed below.

Checkout Procedure

A. Turn on (TMS)

B. Set (TSP) to 35 on the controlpanel

C. Check fuse and replace iffailed. See Page 23. Too heavy agrind causes grinding headtraverse motor to overload andblow the fuse,NOTE: Fuse can not be checkedvisually. Use Ohm test to checkfuse. Fuse must be replaced witha slo-blo fuse.

D. Check for 120 Volts (AC)incoming to (TDC)

E. Check for 120 Volts AC at(TMS). (Make certain (TMS) ison)

Traverse worksYes--end troubleshootingNo--got to Step B. next

Traverse worksYes--end troubleshootingNo--go to Step C. next

Traverse worksYes--end troubleshootingNo--go to Step D. next

On (TDC) Terminal L1 to L2 for 120 VoltsACYes--Go to Step F.No--Go to Step E. next

Measure 120 volts AC from TMS Termi-nal 5 to Term Block 4(Blue)Yes--Verify wiring to TDC.No--Flip Switch and check again-Works--Switch is upside down.Does not work-- Check wiring/VerifyContinuity/ Replace Switch

Possible Cause

Traverse Motor Switch(TMS) is not on

Traverse Speed Pot(TSP) set to zero

Fuse on Traverse DriveControl (TDC) hasfailed

Traverse Drive Control(TDC) is bad

Bad Traverse MotorSwitch (TMS)


45

Checkout Procedure

F. Check for 90 Volts DC across(TDC) terminals #A1 to #A2 thisvoltage drives the DC traversemotor. NOTE: Traverse must beon and have (TSP) turned full CWto maximum voltage of 90 VDC

G. Check traverse motor continuity

H. Check (TSP) (10K) on controlpanel

J. Check (TSP) for 10,000 ohms.Remove three wires from (TDC)red from term #8white from term #7black from term #9

K. Inspect Motor Brushes

Possible Cause

No DC Voltage from(TDC) Traverse DriveControl

Traverse Motor is bad

(TSP) is not working

(TSP) (10K) is bad

Worn motor brushes

Check (TDC) terminals #A1 to #A2 for 90Volts DCYes--go to Step G. nextNo--go to Step H. next

Remove motor wires from Terminal Strip 1terminals #7 & #8 check for 0 ohms acrossthe black and white wires.Yes--end troubleshootingNo--go to Step K. next

(TDC) Pin #8 to #7Pot Full CCW Pot Full CW 0VDC 9.75 VDCPin #8 to 9Pot Full CCW Pot Full CW 9.75 VDC 0 VDCYes--replace the (TDC)No--go to Step J. next

Check for 10,000 ohms red to white wiresFull CCW--0 ohmsFull CW--10,000 ohmsRed to black wiresFull CCW--10,000 ohmsFull CW--0 ohmsYes--replace the (TDC)No--replace (TSP)

Remove the brushes one at a time andmaintain orientation for reinsertion. See ifbrush is worn short, 3/8" (10 mm) minimumlength.Yes--replace motor brushesNo--replace Traverse MotorNOTE: TRAVERSE MOTOR BRUSHESHAVE SHOWN A VERY LONG LIFE.THEREFORE IT IS IMPROBABLE THATMOTOR BRUSHES ARE BAD.

DISCONNECT POWERFROM MACHINE


46

PROBLEM--Traverse does not stop to reverse directions when flag goes under the proxim-ity switch on the left side or right side of machine.

Possible Cause

Gap between flagand prox isincorrect.

Proximity Switch isbad.

Checkout Procedure

A. Gap between flag andprox should be 3/16 to1/4" (4-6 mm). Prox LEDdoes not light when flag isunder prox.

B. Proximity switch is notworking properly or wireconnections are loose.

The light coming onshows the proximity isgetting electricalcontact.

Proximity light on- 0 Volts DCProximity light off- 12 Volts DC

Proximity light on- 0 Volts DCProximity light off- 12 Volts DC

Replace proximityswitch if the voltagesdo not read as above.

If incorrect, adjust per adjustmentsection of manual.Yes--end troubleshootingNo--go to Step B. next

First check to see if proximity lightcomes on. When the light is on, itmeans that there is electricitycoming to proximity switch.Actuate prox switches with steeltool to take measurements.

Left proximity (PROX 1) checkTraverse drive Control (TDC)between terminals #13 (blackwire) and #15 (brown wire).

Right proximity (PROX) check#14 (black wire) and #15 (brownwire).


47

PROBLEM--Traverse speed control goes at one speed only.

Traverse Drive Control Pin #8 to 7Pot full CCW Pot Full CW 0 VDC 9.75 VDCPin #8 to 9Pot full CCW Pot Full CW 9.75 VDC 0 VDCYes--Pot is OKNo--Go to Step B. next

Check for 10,000 ohmsRed to White wiresFull CCW - 0 ohmsFull CW - 10,000 ohmsRed to Black wiresFull CCW - 10,000 ohmsFull CW - 0 ohmsYes--Go to Step C. nextNo--replace potentiometer.Wiper inside of potentiometer controlsspeed. Wiper may be bad and not makingcontact.

Wrong wire hookup effects traverse control.Reversing red and orange wires topotentiometer to the D C motor will run atzero speed but maximum will be too slow.Reversing red and white wires does notaffect speed control.Check for Proper function.Yes--end troubleshootingNo--Go to Step D. next

Minimum and maximum pot settings effecttraverse speed.

Checkout Procedure

A. Check potentiometer on controlpanel.

B. Check potentiometer for 10,000ohms.Remove three wires fromTraverse Drive Controlred from term #8white from term #7black from term #9

C. Check potentiometer wiring forproper hookup. See that speed potis wired per electrical diagram

D. Check all pot settings on circuitboard as shown in wiring diagram.(See adjustment section TraverseMotor Control Board Settings.)

Possible Cause

Defective speed controlpotentiometer

Wiring hookup topotentiometer isimproper.(If components havebeen replaced.)

Main circuit board dialpot settings not correct.(If board has not beenreplaced.)


48

PROBLEM--If the carriage traverses to one end of stroke or theother and it stops and does not reverse direction.

Possible Cause

Proximity switch is notworking properly or wireconnections are loose

The dwell time on thetraverse drive control notset properly.

Loose wire to proximityswitch.

Remedy

First check to see of proximity lightcomes on. When the light is on, itmeans that there is electricity comingto proximity switch.Actuate prox switches with steel toolto take measurements.

Left proximity (PROX1) checkTraverse drive Control (TDC) betweenterminals #14 (black wire) and #15(brown wire).

Right proximity (PROX) check (TDC)between terminals #13 (black wire) and#15 (brown wire).

Reset dwell time as required. Oneincrement increases Dwell time by1/2 second.

Check wire connections from theproximity switches and tighten downscrews.

Reason

The light coming on shows the prox-imity is getting electrical contact.

Proximity light on- 0 Volts DC Proximity light off- 12 Volts DC

Proximity light on- 0 Volts DC Proximity light off- 12 Volts DC

Replace proximity switch if the volt-ages do not read as above.

A loose wire connection will giveintermittent electrical contact.

PROBLEM--Insufficient hesitation at carriage stops prior to reversing traverse.

PROBLEM--Traverse changes directions erratically while running in traversecycle.


49

A--Grinding wheel is loading upwith grinding grit.

B--Too heavy a grind on thefinal grinding pass.

C--Small Grinding Head SlideVee Roller loose

A--Grinding wheel rim is notcompletely over the top facebeing ground.

B--Small grinding Head SlideVee Roller loose.

C--Backlash in infeedhandwheel.

Grinding head is traversing toofast.

A--Coolant not directed ontothe bedknife and grindingwheel.

B--Too heavy stock removalduring grinding.

C--Grinding wheel is glazing.

--POSSIBLE CAUSE-- --REASON----PROBLEM--

Top face ofbedknife isground in aconvex shape(high in thecenter) orconcave shape(low in thecenter)

The top face ofthe bedknife isground unevenlyacross the width.

Too coarsea grind onbedknife.

The top face ofthe bedknifeshows burnmarks from beingtoo hot.

A loaded wheel createsundue pressure on thesurface being ground. Bothends of bedknife movebecause of this pressure,allowing bedknife to rock onthe middle support.

For precise grinding, spark-ing-out process is critical. Iteliminates excessive final-grinding pressure on centersand middle support, whichhelps maintain grindingstraightness.

Looseness in roller causeserratic grind.

When the rim doesn't extendover the top face, it wearsunevenly and causesgrooves across the bedknife.

Looseness in rollers causeserratic grind.

Backlash allows grindingwheel to move under load.

Traversing speed controlsthe grinding surface texture.A slower traverse producesgrind marks closer together.

When the front face of thebedknife gets too hot, thesteel loses its temper(softens).

Too much stock removal inone pass creates too muchheat and softens the steel.

Wheel will glaze if notdressed often enough. Also,as a generalrule, use a higher traversespeed for the heavy grind.

Dress the wheel prescribed inthe Operators Manual.

Follow the procedures in theOperators Manual. On the finalpass, infeed only about .001"[.025 mm]. Let the wheelspark out for 10-20 passes atabout slow speed, with noadditional infeed.

Adjust Vee Rollers perprocedure on Page 34.

The wheel rim must extend overthe bedknife top face by 1/2"[13 mm] whenever possible.See Operators Manual. If notpossible, dress the wheel moreoften.

Adjust Vee rollers perprocedure on Page 34.

Eliminate backlash in infeedhandwheel, see Page 31.

Slow down the traversingspeed.

Direct coolant into the grindingwheel, at the point of the grind.See Operators Manual.

Take off about .002 to .003"[.05 to .075mm] per passduring rough grind. SeeOperators Manual.

Dress the wheel before thefinish-grinding pass on eachbedknife. See OperatorsManual.

--REMEDY--

MECHANICAL TROUBLESHOOTING

50

MECHANICAL TROUBLESHOOTING (Continued)--POSSIBLE CAUSE-- --REMEDY-- --REASON----PROBLEM--

Dress the wheel before thefinish-grinding pass on eachbedknife. See OperatorsManual.

Take off about .002 to .033"[.05 to .075 mm] per passduring rough grind. SeeOperators Manual.

Speed up traverse.

Visually check the outsidediameter runout while slowlyrotating the wheel by hand.Also check the motor without awheel installed. Replace thewheel if out-of -round.

Adjust bearing for propertension. See adjustmentssection of this manual.

Flush linear bearing perlubrication proceedure andreplace wipers. Or replacethree linear bearings andwipers.

Adjust belt clamping force.See adjustment section ofmanual.

Adjust traverse belt tension.See adjustments section of thismanual.

Grinding wheel isglazing tooquickly.

Grinding motorvibratesexcessively.

Carriagetraversing variesspeed whilegrinding

Wheel will glaze if notdressed often enough.If grinding wheel is notextended 1/2" [12 mm]over bedknife, it willglaze more quicklybecause there is lessdressing.

Too light a grinding cutdoesn't permit enoughdressing action on thewheel, so it glazes.

Too slow a traversespeed can causeexcessive heat buildupin the grinding wheel,which glazesthe wheel.

A grinding wheelwhich isn't properlytrued up on outside orinside diameters canvibrate excessivelyand transfer thatvibration to the motor.

When bearing preloadis too tight, it causesexxcessive loading todrive carriage.

Grinding grit is gettinginto the linear bearingsand causing excessivedriving torque of thecarriage.

If the traverse beltclamp is damaged ornot adjusted properlythe belt will slip.

If the belt is too loose itwill tend to vibrate orthe belt tensioningsprings may tend tojump when loaded.

A--Wheel needs dressing.

B--Too light a cut when roughgrinding.

C--Grinding head is traversingtoo slow.

Grinding wheel is out ofbalance.

A--Linear bearings in thecarriage do not rotate freely

B--Belt it slipping.

C--Traverse belt tension is tooloose.

51

THIS PAGE INTENTIONALLY BLANK FOR NOTE TAKING.

52

27555 MAIN BASE ASSEMBLY EXPLODED VIEW

53

1 ................ B250816 .............. 1/4-20 x 1/2 Button Head Socket Cap Screw2 ................ B251016 .............. 1/4-20 x 5/8 Button Head Socket Cap Screw3 ................ B251216 .............. 1/4-20 x 3/4 Button Head Socket Cap Screw4 ................ B371201 .............. 3/8-16x 3/4 Hex Head Cap Screw5 ................ B501601 .............. 1/2-13 x 1 Hex Head Cap Screw6 ................ K371501 .............. 3/8 Lockwasher7 ................ K501501 .............. 1/2 Lockwasher8 ................ H371202 .............. 3/8 Diameter x 3/4 Long Roll Pin9 ................ H371602 .............. 3/8 Diameter x 1 Long Roll Pin10............... J501000 ............... 1/2-13 Hexnut11 ............... R000536 .............. 1/4 Lock Washer12............... 27098 .................. Neary 277 Decal13............... 27169 .................. Prox Cord RH.................. 3707601 ............... Prxomity Sensor

14............... 27168 .................. Prox Cord LH.................. 3707601 ............... Proximity Sensor

15............... 27538 .................. Cabinet Weldment16............... 3706022 ............... Pipe Plug 3/4 NPT17............... 3707009 ............... Strain Relief18............... 3707029 ............... Strain Relief19............... 3708121 ............... Cord Clamp - Double20............... 3708419 ............... Wave Spring Washer21............... 3708421 ............... Flat Washer .75 ID x 1.0 OD x .075 Thick22............... 3708448 ............... Electrical Warning Decal.................. J992000 ............... 1 - 8 Hex Jam Nut.................. A993201 .............. 1 - 8 x 2 Hex Head Cap Screw Full Thread.................. 27147 .................. Grinding Motor Cord (Not Shown).................. 3707379 ............... Light Receptacle Cord (Not Shown).................. 377391................. Coolant Receptacle Cord (Not Shown)

DIAGRAMNUMBER

PARTNUMBER DESCRIPTION

PARTS LIST 27555 MAIN BASE ASSEMBLY

54

27519 GUARD DOOR ASSEMBLY EXPLODED VIEW

55

PARTS LIST 27519 GUARD DOOR ASSEMBLY

1 ................ B190834 .............. 10 - 32 x 1/2 Button Head Socket Cap Screw2 ................ B252811 .............. 1/4 - 20 x 1-3/4 Socket Head Cap Screw3 ................ B311213 .............. 5/16 - 18 x 3/4 Button Head Socket Cap Screw4 ................ B312013 .............. 5/16 - 18 x 1.25 Button Head Socket Cap Screw5 ................ J167000............... 8 - 32 Jam Locknut6 ................ J257100............... 1/4 - 20 Locknut7 ................ J317000............... 5/16 - 18 Jam Locknut8 ................ K190001 .............. #10 Flat Washer9 ................ K310001 .............. 5/16 Flat Washer10 .............. R000453 .............. Flat Washer .31 x .88 x .104 Thick11 ............... 27131 .................. Door Frame Bracket - Right Hand12 .............. 27132 .................. Door Frame Bracket - Left Hand13 .............. 27133 .................. Lower Arm14 .............. 27138 .................. Torque Tube15 .............. 27139 .................. Inside Door Reinforce - Right Hand16 .............. 27140 .................. Inside Door Reinforce - Left Hand17 .............. 27141 .................. Safety Switch Key Bracket18 .............. 27142 .................. Polycarbonate Door19 .............. 27517 .................. Door Arm Weldment - Right Hand20 .............. 27518 .................. Door Arm Weldment - Left Hand21 .............. 3707129............... Safety Switch22 .............. 3707372............... Straight Key - Safety Switch23 .............. 3707563............... Strain Relief24 .............. 3708572............... Ball Stud - 10MM25 .............. 3708577............... D - Handle26 .............. 3708820............... 8 - 32 x .50 Button Head Safety Screw27 .............. 3708865............... 8 - 32 x 1.50 Button Head Safety Screw28 .............. 3708866............... Gas Spring29 .............. 3889045............... Spacer .406 x .875 x .38 Long30 .............. 6709071............... Handle Ferrule.................. 27144 .................. Door Safety Switch Cord (Not Shown).................. 3708378............... Foam Strip - .25 Thick (Not Shown)

DIAGRAMNUMBER


56

27541 BEDKNIFE SUPPORT ASSEMBLY EXPLODED VIEW

57

1 ................ B160605 ..................8-32x3/8 Flat Head Cap Screw2 ................ B190805 ..................10-24x1/2 Flat Head Socket Cap Screw3 ................ B190811 ..................10-24x1/2 Socket Head Cap Screw4 ................ B190813 ..................10-24x1/2 Button Head Socket Cap Screw5 ................ B250611 ..................1/4-20x3/8 Socket Head Cap Screw6 ................ B250816 ..................1/4-20x1/2 Socket Head Cap Screw7 ................ B251211 ..................1/4-20x3/4 Socket Head Cap Screw8 ................ B371216 ..................3/8-16x3/4 Button Head Socket Cap Screw10 .............. C310420 ..................5/16-18x1/4 Socket Set Screw - Cup Pt.11 .............. C310820 ..................5/16-18x1/2 Socket Set Screw - Cup Pt.12 .............. H250802 ..................1/4 dia x 1/2 Long Roll Pin13 .............. H253202 ..................1/4 dia x 2 Long Roll Pin14 .............. J377000 ...................3/8-16 Jam Locknut15 .............. K251501 ..................1/4 Lockwasher16 .............. K370001 ..................3/8 Flat Washer17 .............. K371501 ..................3/8 Lockwasher18 .............. 3709327 ..................Rubber Tip19 .............. 27508 ......................Tooling Bar20 .............. 28181 ......................Center Assy

21 .............. 28196 ......................RH Tooling Pivot Block22 .............. 28200 ......................LH Tooling Slide Bar23 .............. 28201 ......................Tooling Adj. Block24 .............. 27118 .......................Bracket - Tooling pointer25 .............. 28208 ......................Decal - Protractor .........26 .............. 28212 ......................Spacer - 39ID x .750D x .311Long28 .............. 3579109 ..................Nylon Plug 3/16 Dia29 .............. 3589106 ..................Washer - Flat .39 x 1.38 x .12530 .............. 3708148 ..................Handwheel 4.5Dia .38 Bore31 .............. 80318 ......................Knob-T 1.5 1/2-1332 .............. 6009555 ..................Knob Assembly-T 2.5 3/8-16x1.5 Long33 .............. 3709437 ..................Handle - Adj 3/8-16 x 1.9734 .............. 3708652 ..................Washer - Conical 1.2 x 1.83 x .02435 .............. 3708836 ..................Spring - Compressed .600D x .531ID x 2.5Long36 .............. 3709062 ..................Washer - Conical .382 x .75 x .03537 .............. 3709304 ..................Washer - Thrust .375 x .812 x .03238 .............. 6009027 ..................Shaft - Adjusting Acme LH39 .............. 6309050 ..................Lock Bar - LH Adjuster40 .............. 6309051 ..................Lock Bar - Threaded LH Adjuster

41 .............. 6609087 ..................Base - Gage Short C’bore42 .............. 6609016 ..................Block - Slide RH43 .............. 6609018 ..................Shaft - Gage44 .............. 6609019 ..................Magnet45 .............. 6609021 ..................Arm - Center Adjust46 .............. 6609023 ..................Screw - Gage Lock47 .............. 6609093 ..................Lock Support Bar48 .............. 6609092 ..................Slide Lock Bar RH49 .............. 6609501 ..................Knob Assy - T 2.5 1/4-20 x 1.31Long50 .............. 6609535 ..................Mount Weldment LH51 .............. 6609536 ..................Slide Weldment RH52 .............. 6709021 ..................Tip - Gage53 .............. J372000 ...................3/8-16 Hex Jam Nut Thin54 .............. 27115 .......................Spacer .386 IDx .50 ODx .75 Long55 .............. 3999030 ..................3/8-16 x3.62 LG Thread Stud56 .............. 27117 .......................Bracket - Rotation Decal57 .............. B250611 ..................1/4-20 x 3/8 Socket Head Cap Screw

DIAGRAMNUMBER


PARTS LIST 27541 BEDKNIFE SUPPORT ASSEMLBY

58

27554 CHANNEL & TRAVEL ASSEMBLY EXPLODED VIEW

59

PARTS LIST 27554 CHANNEL & TRAVEL ASSEMBLY

1 ................... B160607 ................... 8-32 x 3/8 Button Head Socket Cap Screw2 ................... B251211 ................... 1/4-20 x 3/4 Socket Head Cap Screw3 ................... B252011 ................... 1/4-20 x 1-1/4 Socket Head Cap Screw Full Thread4 ................... B252411 ................... 1/4-20 x 1-1/2 Socket Head Cap Screw5 ................... B256411 ................... 1/4-20 x 4 Socket Head Cap Screw7 ................... J257000.................... 1/4-20 Locknut Thin8 ................... K161501 ................... #8 Lockwasher Split9 ................... K251501 ................... 1/4 Lockwasher Split11 .................. 28192 ....................... Support - Travel Pulley12 ................. 27156 ....................... Traverse Base Machined13 ................. 28197 ....................... Guard - Travel RH14 ................. 50309 ....................... Shaft- Travel Pulley15 ................. 50354 ....................... Pulley - Cog Drive16 ................. 6059062 ................... Motor Assembly - Travel W3417 ................. 50363 ....................... Guard - Traverse Pulley18 ................. 55553 ....................... Idler Pulley Assembly19 ................. 80355 ....................... Washer - Thrust .75ID x 1.25OD20 ................. 80375 ....................... Belt -Cog21 ................. 3708658 ................... Spring - Compression22 ................. 3709331 ................... Ring - Retaining Ext23 ................. 6509063 ................... Shaft - Carrier24 ................. 3708884 ................... Spacer .281 ID x .62 OD x .38 Long25 ................. 3708419 ................... Wave Spring .78 ID x 1.00 OD

DIAGRAMNUMBER


60

27543 CARRIAGE ASSEMBLY EXPLODED VIEW

61

1 ................... B191011 ................... 10-24 x 3/4 Button Head Socket Cap Screw2 ................... B250816 ................... 1/4-20 x 1/2 Button Head Socket Cap Screw3 ................... B252016 ................... 1/4 -20 x 1-1/4 Button Head Socket Cap Screw4 ................... B253216 ................... 1/4 - 20 x 2 Button Head Socket Cap Screw5 ................... J252000.................... 1/4-20 Hex Jam Nut6 ................... J627200.................... 5/8 - 18 Locknut - Jam Nylon7 ................... K251501 ................... 1/4 Lockwasher Split8 ................... 28183 ....................... Bracket - Travel Clamp9 ................... 28187 ....................... Block - Travel Clamp10 ................. 28188 ....................... Spacer - Travel Clamp11 .................. 28189 ....................... Block - Clamp Support12 ................. 28191 ....................... Carriage - Grinding Head13 ................. 28211 ....................... Bracket - Rail Wiper14 ................. 28507 ....................... Travel Clamp Assembly 27515 ................. 50310 ....................... Tip - Belt Clamp16 ................. 80335 ....................... Clamp17 ................. 3709044 ................... Bearing - Ball Bushing18 ................. 3969064 ................... Wiper - Foam

DIAGRAMNUMBER


PARTS LIST 27543 CARRIAGE ASSEMBLY

62

6609529 GRINDING HEAD ASSEMBLY EXPLODED VIEW

63

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PARTS LIST 6609529 GRINDING HEAD ASSEMBLYD

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64

27532 COOLANT ASSEMBLY EXPLODED VIEW

65

1 ................... B191611 ................... 10-24 x 1 Socket Head Cap Screw2 ................... C161020 ................... 8-32 x 5/8 Socket Set Screw3 ................... J167000.................... 8-32 Jam Lock Nut4 ................... K190001 ................... #10 Flat Washer5 ................... K191501 ................... #10 Lockwasher Split6 ................... 3679116.................... Connector - Shut Off Valve7 ................... 3708339 ................... Barbed Connector8 ................... 80340 ................... Coolant - Pint9 ................... 3709593 ................... Barbed Connector10 ................. 3709595 ................... Shut Off Valve11 .................. 3709642 ................... Coolant Line Assembly12 ................. 6609044 ................... Coolant Tube 1/4 ID13 ................. 6609046 ................... Cover - Coolant Pump14 ................. 6709209 ................... Coolant Pump

DIAGRAMNUMBER


PARTS LIST 27532 COOLANT ASSEMBLY

66

27548 ELECTRICAL PANEL SUB - ASSEMBLY EXPLODED VIEW

67

PARTS LIST 27548 ELECTRICAL PANEL SUB - ASSEMBLYDIAGRAMNUMBER


1 ................... D160666 ................... #8 x 3/8 Seft Tapping Screw2 ................... D161266 ................... #8 X3/4 Self Tapping Screw3 ................... R000480 ................... #8 External Tooth Lock Washer4 ................... 55223 ....................... Terminal Strip Decal5 ................... 3707073 ................... 8 Pin Socket6 ................... 3707163 ................... Primary Ground Decal7 ................... 3707164 ................... Primary Ground Lug8 ................... 3707378 ................... Din Rail 14”9 ................... 3707403 ................... Power Line Filter10 ................. 3707550 ................... Traverse Control Board11 .................. 3707556 ................... Magnetic Starter12 ................. 3707558 ................... Voltage Sensor Relay13 ................. 3707625 ................... End Stop - Terminal Block14 ................. 3707626 ................... Jumper - Adjacent Terminal Block15 ................. 3707627 ................... End Plate - Terminal Block16 ................. 3707628 ................... Terminal Block - 2 Conductor Grey17 ................. 3707629 ................... Terminal Block - 2 Conductor Blue18 ................. 3708826 ................... Decal - LVR Warning19 ................. 6009270 ................... Panel - Electrical20 ................. 3707589 ................... Circuit Breaker - 15 Amp21 ................. 3707706 ................... Terminal Strip - 19 Pole22 ................. 3707707 ................... Straight Double Spade Terminal23 ................. 3707709 ................... Single 90° Spade Terminal24 ................. 3707708 ................... Double 90° Spade Terminal25 ................. 3707779 ................... 6-Amp Circuit Breaker26 ................. 3707624 ................... Grpimd Terminal Block..................... 3707224 ................... Cable Tie Mount (Not Shown)..................... 3707225 ................... Cable Tie 6.5” Long x .18 Wide (Not Shown)..................... 3707255 ................... Cable Tie 4” Long x .10 Wide (Not Shown)..................... 3707773 ................... Wire Harness Assembly - Common (Not Shown)..................... 27150 ....................... Wire Harness Assembly - 277 Panel (Not Shown)..................... 27146 ....................... Wire Harness Assembly - 277 Control (Not Shown)..................... 6509147 ................... Wire Assembly (Not Shown)

68

27549 CONTROL PANEL ASSEMBLY EXPLODED VIEW

69

1 ................... D250800 ................... 1/4-20 x 1/2 Thread Cutting Screw Hex Head2 ................... R000536 ................... 1/4 Internal Tooth Lock Washer3 ................... 27516 ....................... Control Panel Weldment4 ................... 27548 ....................... Electrical Panel Sub-Assembly (See Pages 66-69)5 ................... 80409 ....................... Decal - Control Panel6 ................... 3707093 ................... Strain Relief7 ................... 3707342 ................... Yellow E-Stop Ring8 ................... 3707367 ................... Rocker Switch - On/Off9 ................... 3707429 ................... Rocker Switch - On/Off10 ................. 3707442 ................... 2 Amp Circuit Breaker11 .................. 3707444 ................... 10 Amp Circuit Breaker12 ................. 3707446 ................... Potentiometer Knob13 ................. 3707564 ................... Green Start Pushbutton14 ................. 3707565 ................... Normally Open Contact Block15 ................. 3707566 ................... Pushbutton Mounting Latch16 ................. 3707567 ................... Red Push/Pull E-Stop Pushbutton17 ................. 3707568 ................... Normally Closed Contact Block18 ................. 3708703 ................... Decal - Safety Symbol..................... 6059054 ................... Main Power Cord (Not Shown)..................... 3708378 ................... .25 Thick Foam Strip (Not Shown)

DIAGRAMNUMBER


PARTS LIST 27549 CONTROL PANEL ASSEMBLY

70

27402 WIRING DIAGRAM

71

27402 WIRING DIAGRAM

72

Make

JacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJacobsenJohn DeereLescoNationalRansomesRansomesRansomesToroToroToroToro

Model

19” & 22” Greens MowerBlitzer, F133, FairwayGreens King 418, 518, 422, 522Greens King 426, 526Greens King II, IV, IV Plus, VHFS, HM11LF1000, 123, 128, 3810Ranger, ST5111TF60Tri King 671, 1672, 1684, 1900Trim King, Turf King II, 76, 84All ModelsAll ModelsAll ModelsG-Plex 160Fairway, 250, 305, 405Motor 180, 350D, T-Plex 185GR500, 1000, 3000, HTM 175RM5100, 5300, 6500RM108, 216, 2300, 3500, 4500RM5, RM7, RMII, Spartan, Turf Pro

Front Angle inDegrees

0 to -50 to -50 to -50 to -50 to -50 to -50 to -50 to -50 to -50 to -50 to -5

-5-5-5

0 to -500

-15**-15**-15**-15**

Top Angle inDegrees

-8 to -10+4 to +6-8 to -10-8 to -10-8 to -10+4 to +6-8 to -10+4 to +6-8 to -10+4 to +6+4 to +6

-5-6-5

-8 to -10-3-3-5-5-5-5

** If height of cut is less than 1/2”, increase angle up to -30 degrees

Bed Knife Grind Angles

model 277 bed knife grinder owner’s manual (12-08).pdf · model 277 bed knife grinder warning you...

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