Using The Clutch Shim - Toro 74942 Operator's Manual

4. Tighten the locknut until the spring washers are flat and
then back off a 1/4 turn to properly set the pre-load on
the bearings (Figure
Important: Make sure the spring washers are
installed correctly as shown in
5. Install the dust cap
Figure 66
1. Spring washers
2. Locknut

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.
Figure 67
1. Armature
2. Field shell
3. Rotor
4. Brake mounting bolt
66).
Figure 66.
(Figure 66).
3. Dust cap
5. Brake spacer
6. Re-gap shim
7. Brake pole
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.
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 12 V 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 1 mm (0.04 inch), 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).
45
Figure 68
Figure 69