Using The Clutch Shim - Toro 78922 Operator's Manual

1. Spring Washers
2. Lock Nut

Using the Clutch Shim

Some later model year units have been built with clutches
that contain a brake shim. When the clutch brake has
worn to the point where the clutch no longer engages
consistently, the shim can be removed to extend the
clutch life.
1. Armature
2. Field shell
3. Rotor
4. Brake mounting bolt
Removing the Clutch Shim
1. Stop the engine, wait for all moving parts to stop,
and remove the key. Engage the parking brake.
Allow the machine to cool completely before starting
these instructions.
Figure 64
3. Dust Cap
Figure 65
5. Brake spacer
6. Re-gap shim
7. Brake pole
2. Using an air compressor, blow out any debris from
under the brake pole and around the brake spacers.
3. Check the condition of the wire harness leads,
connectors, and terminals. Clean or repair as
necessary.
4. Verify that 12V is present at the clutch connector
when the PTO switch is engaged.
5. Measure the gap between the rotor and armature.
If the gap is greater than .04 inch (1 mm), proceed
with the following steps:
A. Loosen both brake mounting bolts one-half to
one full turn as shown below.
Note: Do Not remove the brake pole from the
field shell/armature. The brake pole has worn
to match the armature and needs to continue to
match after the shim is removed to ensure proper
brake torque.
1. Brake mounting bolt
B. Using needle nose pliers, or by hand, take hold
of the tab and remove the shim (Do Not discard
the shim until proper clutch function has been
confirmed).
46
Figure 66
Figure 67