Toro 74933 Operator's Manual page 48

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 allow the machine to
cool down completely.
3. Using an air compressor, blow out any debris from
under the brake pole and around the brake spacers.
Figure 66
4. Check the condition of the wire-harness leads,
connectors, and terminals. Clean or repair as necessary.
5. Verify that 12 V is present at the clutch connector
when you engage the PTO switch.
6. Measure the gap between the rotor and armature. If
the gap is greater than 1 mm (.04 inch), proceed with
the following steps:
A. Loosen both brake mounting bolts a half to a 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 you remove the shim to ensure proper
brake torque.
Figure 67
1. Brake-mounting bolt
B. Take hold of 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 13 N∙m (10 ft-lb)
+/- 0.7 N∙m (0.5 ft-lb).
E. Using a 0.010 inch thick feeler gauge, verify that
a gap is present between the rotor and armature
face on both sides of the brake pole as shown.
Note: Due to the way the rotor and armature
faces wear (peaks and valleys) it is sometimes
difficult to measure the true gap.
1. Feeler gauge
1. Feeler gauge
•
If the gap is less than 0.010 inch, then install
the shim and refer to
65).
•
If the gap is sufficient, proceed to the safety
check in step F.
48
Figure 68
Figure 69
Figure 70
Troubleshooting (page