Using The Clutch Shim - Toro 74958 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.
Figure 64
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.
Figure 65
4. Check the condition of the wire-harness leads,
connectors, and terminals. Clean or repair them
as necessary.
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5. Brake spacer
6. Regap shim
7. Brake pole
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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).
52
Figure 66.
Figure 66
Figure 67
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