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SEBU7808-11

February 2011

Operation andMaintenance

Manual988H Wheel Loader

BXY1-3999 (988H)

SAFETY.CAT.COM

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38 SEBU7808-11Operation SectionBefore Operation

Operation Section

Before Operation

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Mounting and Dismounting

SMCS Code: 7000

g00037860Illustration 36

Typical example

Mount the machine and dismount the machine onlyat locations that have steps and/or handholds. Beforeyou mount the machine, clean the steps and thehandholds. Inspect the steps and handholds. Make

all necessary repairs.

Face the machine whenever you get on the machineand whenever you get off the machine.

Maintain a three-point contact with the steps and withthe handholds.

Note: Three-point contact can be two feet and onehand. Three-point contact can also be one foot andtwohands.

Do not mount a moving machine. Do not dismount amoving machine. Never jump off the machine. Do

not carry tools or supplies when you try to mount themachine or when you try to dismount the machine.Use a hand line to pull equipment onto the platform.Do not use any controls as handholds when youenter the operator compartment or when you exit theoperator compartment.

Machine Access SystemSpecifications

The machine access system has been designed tomeet the intent of the technical requirements in ISO2867 Earth-moving Machinery Access Systems.The access system provides for operator access tothe operator station and to conduct the maintenanceprocedures described in Maintenance section.

Alternate Exit

Machines that are equipped with cabs have alternateexits. For additional information, see Operation andMaintenance Manual, Alternate Exit.

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Daily Inspection

SMCS Code: 1000; 7000

Hot oil and hot components can cause personalinjury. Do not allow hot oil or hot components tocontact skin.

At operating temperature, the engine coolant ishot andunder pressure.

Steam can cause personal injury.

Check the coolant level only after the engine hasbeen stopped and the cooling system pressurecap iscool enough to touch with your bare hand.

Remove the cooling system pressure cap slowlyto relieve pressure.

Cooling system conditioner contains alkali. Avoidcontact with the skin and eyes to prevent personalinjury.

NOTICE

Accumulated grease and oil on a machine is a fire haz-ard. Remove this debris with steam cleaning or highpressure water, at least every 1000 hours or each timeany significant quantity of oil is spilled on a machine.

For a maximum service life of the machine, completea thorough walk-around inspection before you mountthe machine and before you start the engine.

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SEBU7808-11 39Operation SectionBefore Operation

Inspect the area around the machine and under themachine. Inspect the machine components and linesfor defects. Look for loose bolts, trash buildup, oil,coolant, fuel, or exhaust leakage, broken parts, orworn parts.

Note: Watch closely for leaks. If you observe a leak,find the source of the leak and correct the leak. If yoususpect a leak or you observe a leak, check the fluidlevels morefrequently.

Inspect the condition of the equipment and of thehydraulic components.

Check the condition of the tires. Adjust the inflationpressure,if necessary.

Check all of the oil levels, all of the coolant levels,and all of the fuel levels.

Remove any trash buildup and debris. Make allnecessary repairs before you operate the machine.

Make sure that all covers and guards are securelyattached.

Adjust the mirrors for the correct rear view of themachine.

Grease all of the fittings that are scheduled on a dailybasis.

Daily, perform the procedures that are applicableto your machine. Refer to the Operation and

Maintenance Manual, Maintenance IntervalSchedule Every 10 Service Hours or Daily categoryfor the list of procedures.

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Steering Frame Lock

SMCS Code: 7506

No clearance for person in this area when machine

turns. Severe injury or death from crushing couldoccur.


The steering frame lock is located at the articulationjoint on the left side of the machine.

g01000479

Illustration 38

Connect steering frame lock (1) when the machineis being lifted and when the machine is beingtransported. Also connect the steering frame lock ifyou are performing service work near the articulation

joint. Install pin (2) and secure the pin with lockingpin (3).


Separate steering frame lock (1) before the machineis operated.

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40 SEBU7808-11Operation SectionBefore Operation

Move the steering frame lock to the front frame andinstall pin (2). Secure the pin with locking pin (3).

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SEBU7808-11 41Operation Section

Machine Operation

Machine Operation

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Alternate Exit

SMCS Code: 7310


The right side cab window can be used as analternate exit. The window can only be opened fromthe inside of the cab.

Pull latch (2) backward and push the latch outwardin order to open the window to the partial openposition. Remove pin (1) from the window and pushthe window to the fully open position.

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Seat

SMCS Code: 7312

Note: The operator's seat that is provided with thismachine is in compliance with the appropriate classof ISO 7096.

Adjust the seat in order to allow full travel of thepedals. Make the seat adjustments when the operatoris sitting against the back of the seat.


Mechanical Suspension

Backrest (1) Pull up on the backrest inorder to remove extension.

Lumbar Support (2) Push the leverbackward in order to increase support tothe lower back. Pull the lever forward in

order to decrease support to the lower back. Releasethe lever in order to lock the seat into position.

Rotate knob (3) in order to adjust the angle of thearmrest in the operating position.

Cushion Angle Adjustment (4) Pull thelever upward. Hold the lever upward and

move the seat cushion to the desired angle.Release the lever in order to lock the seat cushioninto position. The seat cushion can be adjusted toone of three positions.

Fore and Aft Position (5) Pull the leverupward. Hold the lever upward and slidethe seat forward or backward to the desired

position. Release the lever in order to lock the seatinto position.

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42 SEBU7808-11Operation SectionMachine Operation

Seat Backrest Angle Adjustment (6) Pull the lever upward. Hold the leverupward and adjust the backrest to the

desired angle. Release the lever in order to lock thebackrest into position.

Seat Height (7) Pull the lever upward.Hold the lever upward and move the seatto the desired height. Release the lever in

order to lock the seat into position.

Air Suspension (If Equipped)

Seat Height (Air suspension) (7) Pushin on the air valve knob (7) in order to raisethe heightof the seat. Pull out on the air

valve knob (7) in order to lower the height of the seat.

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Seat Belt

SMCS Code: 7327

Note: This machine was equipped with a seat beltwhen the machine was shipped from Caterpillar.

At the time of installation, the seat belt and theinstructions for installation of the seat belt meet theSAE J386 and ISO 6683 standards. Consult your Catdealerfor all replacement parts.

Always check the condition of the seat belt andthe condition of the mounting hardware before youoperate the machine.

Seat Belt Adjustment forNon-Retractable Seat Belts

Adjust both ends of the seat belt. The seat belt shouldbe snug but comfortable.

Lengthening the Seat Belt


1. Unfasten the seat belt.


2. To remove the slack in outer loop (1), rotate buckle(2). This will free the lock bar. This permits theseat belt to move through the buckle.

3. Remove the slack from the outer belt loop bypulling on the buckle.

4. Loosen the other half of the seat belt in the samemanner. If the seat belt does not fit snugly with thebuckle in the center, readjust the seat belt.

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SEBU7808-11 43Operation Section

Machine Operation

Shortening theSeat Belt


1. Fasten the seat belt. Pull out on the outer belt loopin order to tighten the seat belt.

2. Adjust the other half of the seat belt in the samemanner.

3. If the seat belt does not fit snugly with the bucklein the center, readjust the seat belt.

Fastening The Seat Belt


Fasten the seat belt catch (3) into the buckle (2).Make sure that the seat belt is placed low across thelapof the operator.

Releasing The Seat Belt


Pull up on the release lever. This will release the seatbelt.

Seat Belt Adjustment forRetractable Seat Belts

Fastening The Seat Belt


Pull seat belt (4) out of the retractor in a continuousmotion.

Fasten seat belt catch (3) into buckle (2). Make surethat the seat belt is placed low across the lap of theoperator.

The retractor will adjust the belt length and theretractor will lock in place. The comfort ride sleevewill allow the operator to have limited movement.

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44 SEBU7808-11Operation SectionMachine Operation

Releasing The Seat Belt


Push the release button on the buckle in order torelease the seat belt. The seat belt will automatically

retract into the retractor.

Extension of the Seat Belt

When using retractable seat belts, do not use seatbelt extensions, or personal injury or death canresult.

The retractor system may or may not lock up de-pending on the length of the extension and thesize ofthe person. If the retractor does not lock

up, the seat belt will not retain the person.

Longer, non-retractable seat belts and extensions forthe non-retractable seat belts are available.

Caterpillar requires only non-retractable seat belts tobe used with a seat belt extension.

Consult your Cat dealer for longer seat belts and forinformation on extending the seat belts.

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Mirror(If Equipped)

SMCS Code: 7319

Adjust all mirrors as specified in the Operationand Maintenance Manual. Failure to heed thiswarning can lead to personal injury or death.

Slips and falls can result in personal injury. Usethe machines access systems when adjusting themirrors. If the mirrors cannot be reached using themachine access systems follow the instructionsfound within the Operation and Maintenance Man-ual, Mirror in order to access the mirrors.

Note: Your machine may not be equipped with all ofthe mirrors that are described in this topic.


(1) Left Outside Mirror(2) Right Outside Mirror


(3) Left Inside Mirror(4) Right Inside Mirror

Mirrors provide additional visibility around yourmachine. Make sure that the mirrors are in properworking condition and that the mirrors are clean.

Adjust all mirrors at the beginning of each work periodand adjust the mirrors when you change operators.

The appropriate organization of the job site is alsorecommended in order to minimize hazards due tovisibility. For more information refer to this Operationand Maintenance Manual, Visibility Information.

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