Removing The Clutch Shim - Toro 72958 Operator's Manual

Removing 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 67
1. Armature
2. Field shell
3. Rotor
4. Brake-mounting bolt
1. Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Using an air compressor, blow out any debris
from under the brake pole and around the brake
spacers (Figure 68).
Figure 68
4. Check the condition of the wire-harness leads,
connectors, and terminals.
Note:
Clean or repair as necessary.
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5. Brake spacer
6. Re-gap shim
7. Brake pole
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5. Verify that 12 V is present at the clutch connector
when the blade-control switch (PTO) switch is
engaged.
6. Measure the gap between the rotor and
armature. If the gap is greater than 1 mm (0.04
inch), do 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 proper brake torque.
1. Brake-mounting bolt
B. Using needle-nose pliers, or by hand, hold
the tab and remove the shim
Note:
Do not discard the shim until the
clutch is functioning properly.
1. Shim
C. Using a pneumatic line, blow out any debris
from 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).
E. Using a 0.25 mm (0.01 inch) thick feeler
gauge, verify that a gap is present between
the rotor and the armature face on both
52
Figure 69.
Figure 69
(Figure
Figure 70
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70).
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