Drive Clutch Inspection
Inspect the tapered ends of the crankshaft and pri-
2
1.
mary fixed sheave for scratches. If either is severely
scratched, replace component. If scratches are minor,
burnish the component with emery cloth.
1
2.
worn, replace all cam weights as a set.
Check the surface of the cam weights (Fig. 17). If
Figure 17
3.
is found, replace all rollers as a set.
Check the rollers (Fig. 18). If binding or uneven wear
1.
Cam weight
2.
Worn contact surface
4.
abrasivepaper.Ifthechrome--platedsurfaceofthebolts
or pins is scaled off, replace the damaged components.
Clean pilot bolts and roller pins with 800 -- 1000 grit
2
3
5.
wear and/or fraying. If surface is worn/frayed, replace
component.
Check thecontact surface ofthemovable sheave for
6.
fatigued.
Inspect the clutch spring and replace if damaged or
1
Figure 18
Drive Clutch Assembly (Fig. 15)
1.
2.
Roller
3.
Roller uneven wear
Weight contact surface
1.
If removed, install rollers, washers and roller pins to
spider. Roller pins should be lubricated with Toro part
(see Special Tools).
#104--7011
2.
Lubricate cam weights with Toro part #104--7011
(see Special Tools). Make sure lubricant penetrates to
pilotboltsbyrotatingandslidingtheweightssidetoside,
or remove weights if needed to lubricate properly. As-
semble cam weights to moveable sheave as follows:
2
1
1
2
A. Make sure the threads of the pilot bolts are clean
and dry. Apply Loctite #271 (or equivalent) to the
threads of each bolt.
3
1
IMPORTANT: To maintain the balance of the
clutch, all pilot bolts must be installed with their
threads pointing in a clockwise direction (Fig.
19).
2
Figure 19
1.
2.
Pilot bolt
Pilot bolt threads
3.
Moveable sheave
B. Immediately install new lock nuts on the pilot
bolts. Tighten nuts until they just touch the sheave
casting. Never reuse lock nuts.
3.
Apply Loctite #271 (or equivalent) to the threads of
the fixed sheave post.
4.
moval tool kit (see Special Tools). Make sure to align
matchmark made during disassembly.
Installspidertothefixedsheavepostusingspiderre-
5.
Torque spider to 100 ft--lb (136 N--m).
6.
able sheave with three (3) cap screws. Torque cap
Position cover to clutch. Secure cover to the mov-
screws from 75 to 100 in--lb (8.5 to 11.3 N--m).
Workman MD/MDX
Page 5 -- 13
Drive Train
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| Document Type | Service Manual |
| Language | English |
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