22
CLUTCH REPLACEMENT - LO-BOY
1. Remove the upper and lower clutch covers (Fig. 23,
Item 27, 11).
2. Remove the splash cover from the clutch brackets
and spacer tubes. (Fig. 23, Item 17)
3. Disconnect the two clutch leads from the electrical
control board leads.
4. Remove gearbox cover with manifold fi lter from
gearbox.(Fig. 23, Item 30). Disconnect hose (Fig. 20,
Item 14) from fl uid section.
5. Disconnect and remove fl uid section from gearbox,
including Connecting Rod Assy. (See"Fluid Pump
Disconnect, pg. 15)
6. Remove four nuts (Fig. 23, Item 23) on the engine
side of (Item 18) from screws (Item 24) which pass
through spacer tubes (Item 15). This will allow removal
of Gearbox & Clutch Assembly from "Holder-Manifold"
(Item 18).
7. Pull the cog belt loose from the engine shaft cog
pulley (Fig.23, Item 10) and remove the gearbox/
pulley (Fig.23, Item 10) and remove the gearbox/
pulley (Fig.23, Item 10) and remove the gearbox/
clutch assembly from the rest of the unit.
8. Place gearbox in vice by gripping the fl at part of the
Place gearbox in vice by gripping the fl at part of the
drive crank allowing the clutch assembly to face up.
drive crank allowing the clutch assembly to face up.
Use caution and not allow gearbox to swing and
damage casting against vice.
9. Hold coupling screw, with 13/16" wrench, then with
5/16" allen wrench, screw differential screw (Fig. 15,
Item 1), out of coupling screw and gearbox shaft.
10.Screw large end of differential screw into coupling
nut assembly (Fig. 15, Item 2) and pull out of clutch
assembly.
11.The clutch (Fig. 15, Item 5) can now be removed.
INSTALL NEW CLUTCH AS FOLLOWS:
1. With gearbox held as described above (Step 8),
place fi rst spacer, (Fig. 15, Item 8) and bearing, (Fig.
15, Item 6) onto gearbox shaft.
2. Insert snap rings (2), Item 7 into recesses of cog
pulley portion of clutch. Place cog pulley portion of
clutch with cog belt attached onto shaft.
3. Place second spacer, (Item 8) into cog pulley portion
of clutch. This spacer will rest on the fi rst bearing,
(Item 6) installed.
4. Insert second bearing, (Item 6) on top of upper snap
ring, (Item 7).
9. With 13/16" wrench on coupling screw and 5/16"
allen wrench in differential screw, simultaneously
with both wrenches screw coupling nut assembly
into gearbox shaft by turning clockwise until a
positive stop is reached.
10. Hold coupling nut ass'y and tighten diffential screw
to 30 ft.-lbs. This will expand the coupling assembly,
thereby holding the clutch assembly to gearbox
shaft. Turn clutch observing clutch gap. The pulley
should turn freely with a gap of .012 to .024" between
the two clutch faces. If the gap is greater than .028,
remove the spacer (Item 4). Reassemble and check
gap for proper clearance.
11. Place Cog Belt over Cog Pulley portion of clutch.
Loosen set screws (Fig. 14, Item 6) until set screws
are approximately 1/4" above Block Tensioneer (Item 7)
12. Reassemble the Spacers (Fig. 23, Item 15) onto screws.
(Item 24). Simultaneously lift gearbox assembly with clutch
into position by placing Cog Belt over engine shaft log
pulley and inserting the four Screws (Item 24) into Holder-
Manifold (Item 18) and replacing Nuts (4) (Item 23). Tighten
nuts to hold assembly in place.
13. Slightly loosen Screws (4) (Fig. 14, Item 5).
14. Evenly tighten Set Screws (Fig. 14, Item 6) until fl ush with
tip of Block Tensioner (Item 7). Check tension on Cog Belt
by pressing hard with thumb. Proper tensioning should
allow for approximately 1/8". If belt is too loose, tighten Set
Screws further.
15. Replace Connecting Rod and Fluid Section. Preplace Front
Cover on gearbox. Connect Hose (Fig. 20, Item 14) to fl uid
section.
16. Connect the clutch and board leads. Connect Spring
(Figure 15, Item 10) to spacer tube.
17. Replace the splash shield.
18. Test the clutch for proper operation.
19. Replace clutch covers.
REMOVE CLUTCH AS FOLLOWS:
5. Lay removable spacer (Item 4) on top of last bearing.
If the clutch air gap is larger than .028", do not use
removable spacer. Put spacer (Item 3) over
removable spacer, if used, and top bearing.
6. Place coil portion of clutch down onto cog pulley
portion of clutch and center on gearbox shaft.
7. Screw differential screw, (Item 1) into coupling screw
and nut (Item 2) until 1/16" is showing. (See Fig. 16)
8. Push coupling nut assembly, (Item 1 & 2) into clutch
assembly until it comes to a positive stop.
(Differential screw comes into contact with the
threaded gearbox shaft.)
INSTALL NEW CLUTCH CONTINUED
