CLUTCHING

4.25

Spider Button Shimming, Cont.

2. Measure the dimension between towers at the lowerhalf of the towers as shown.

3. Install spider buttons using a soft face hammer.

4. Record width of spider buttons on each leg.

5. Add shims beneath trailing side spider button toobtain specified button-to-tower clearance whenassembled.

Use DialCaliper

Measure towerwidth at bottomof travel

Measure eachleg and record

Button to Tower Clearance -

P-85 = .002″ (.05 mm)

CLUTCHING

4.26

Drive Clutch Assembly

1. Place the correct number of spacer washersbeneath the spider. Spacer PN 5132542 is asteppedwasher that can be placed in addition to one of theabove shims for precise shimming.

2. Assemble clutch making sure “X” marks on movablesheave and spider, or reference marks made beforedisassembly are aligned to achieve proper balance.

NOTE: If belt to sheave clearance is being changed byadding or removing washers from under the spider, andthe sheaves were marked before disassembly, follow in-dexing procedure on page 4.28.

3. Torque spider to specification.

4. Torque jam nut to specification (P-85 Clutches).Install weights with weight pin nut on trailing side.Use new nuts to ensure proper retention. Torque nutto 30 in. lbs.

Marks

Spider Torque - P85 (all except 800 RMK)

Spider Removal ToolPN 2872987

200 ft. lbs. (276 Nm)

Spider Torque - P85 (800 RMK)

Spider Removal ToolPN 2872987

230-250 ft. lbs. (318-346 Nm)

Jam Nut Torque - P85 (except 800 RMK)

Jam Nut Tool

235 ft. lbs. (325 Nm)

PN 2870338Weight Pin Nut Torque

30 In. Lbs. (3.4 Nm)

Jam Nut Torque - P85 (800 RMK)200 ft. lbs. (277 Nm)

CLUTCHING

4.27

Assembly, Cont.5. Install spring and cover. Torque cover bolts evenly to

specification.CAUTION:Carefully align bushing with shaft duringinstallation of cover to prevent bushing damage. Maintainalignment by tightening cover bolts evenly and carefully.

Installation

1. Slight galling or scoring of the bore taper can usuallybe corrected using a tapered reamer. Place reamer ina vise and lubricate with cutting oil. Clean taper bymanually rotating clutch clockwise.

2. Check crankshaft taper for galling or scoring. Ifnecessary clean taper evenly with 200 grit emerycloth.

3. Both clutch taper and crankshaft taper should beclean and dry.

NOTE: Do not use harsh cleaners which may causeclutch taper to corrode during use. This will cause diffi-culty when removing clutch in future. Clean clutch taperwith lacquer thinner or isopropyl alcohol.

Spider Cover Bolt Torque -

90 in. lbs. (10 Nm)

Tapered Reamer PN 2870576

CLUTCHING

4.28

Installation, Cont.

4. Slide clutch fully onto crankshaft taper.

5. Install retaining bolt with any spacers, washers orO-rings. See appropriate parts manual for type andplacement of retaining bolt components.

6. Torque retaining bolt to specifications. Hold clutchwith strap wrench.

NOTE: Re-torque clutch to specification after first peri-od of operation (such as a test ride).

Drive Clutch Bolt Torque (14mm / 7/16″):50 ft lbs. (69 Nm)

CLUTCHING

4.29

Spider Indexing

NOTE: Spider indexing affects clutch balance and beltto sheave clearance. Read procedures carefully beforeproceeding.

1. Before disassembling drive clutch, mark spider,cover, moveable sheave, and stationary sheave inline with a permanent marker as shown.

2. Disassemble drive clutch as described on page4.20-4.21. Take care to note the amount andthickness of the shim washers under the spider.

3. Add or remove spider washers as required toachieve desired belt to sheave clearance.

S For example: If belt to sheaveclearance is .020″too large, removing one .020″ shim will positionthe movable sheave closer to the fixed sheavereducing belt to sheave clearance by .020″.

NOTE: The following washers are available for fine tuning:

4. Install spider washer(s) and spider aligning Xs.Notice as the spider seat location is changed, thesheave marks made before disassembly no longeralign. There are two ways to bring the sheave marksinto alignment.

S Vary the amount and thickness of spacer washers(Washer thickness may vary slightly).

S Re-index marked spider leg to another tower.This can be done because spider has little effecton overall clutch balance.

Re-indexing the spider 1/3 turn clockwise, or 1 leg, willallow the realignment of the moveable and stationarysheaves as previously marked. For example:

S .020″ or .032″ washer removed - re-indexspider clockwise 1/3 turn

S .050″ or .064″ washer removed - re-indexspider clockwise 1/3 turn

S Two .050″ or .064″ washers removed -re-index clockwise 2/3 turn

NOTE: Alignment marks should be within 1″ (25 mm) af-ter final assembly and torquing.

PN 5132542

PN 5210754 .050″PN 5210753 .030″PN 5210752 .020″PN 5132542 Stepped washer in addi-tion to one of the above shims for pre-cise shimming

Washers:

CLUTCHING

4.30

Driven Clutch Removal

1. Remove driven clutch retaining bolt.

2. Slide driven clutch off jackshaft. It may benecessary to use a puller on some driven clutches.P-85 clutches (externally adjustable) can beremoved using a 3-point flywheel or steering wheelpuller and the 1/4-20 adjustment bolt holes. Use asuitable spacer on the end of the jackshaft.

3. Inspect jackshaft keyway for wear or damage. Newkey PN 7721128 (Pro X Fan)key PN 7721116 (Pro X 440/600/700/800)

NOTE: Notice the number and thickness of shim washersbetween driven clutch and jackshaft bearing. These mustbe replaced to maintain proper offset/alignment.