Using The Clutch Shim - Toro 74946 Operator's Manual

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, you
can remove the shim to extend the clutch life.
1. Armature
2. Field shell
3. Rotor
4. Brake-mounting bolt
Removing the Clutch Shim
1. Shut off the engine, wait for all moving parts to stop,
and remove the key.
2. Engage the parking brake and wait for machine to cool
completely.
3. Using an air compressor, blow out any debris under the
brake pole and around the brake spacers.
4. Check the condition of the wire-harness leads,
connectors, and terminals. Clean or repair them as
necessary.
Figure 65
5. Brake spacer
6. Regap shim
7. Brake pole
Figure 66
5. Verify that 12 V is present at the clutch connector
when the you engage the blade-control switch (PTO).
6. 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 1/2 to 1 full
turn as shown in
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 you remove the shim to ensure the
proper brake torque.
1. Brake-mounting bolt
B. Using needle-nose pliers, or by hand, remove the
shim.
Note: Do not discard the shim until you confirm
that the clutch functions properly.
1. Shim
C. Using a pneumatic line, blow out any debris under
the brake pole and around the brake spacers.
D. Torque each bolt (M6 x 1) to 12.3 to 13.7 N∙m
(9.5 to 10.5 ft-lb).
50
Figure 67.
Figure 67
Figure 68