Toro 74906 Operator's Manual page 47

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.
Figure 71
3. Check the condition of the wire harness leads,
connectors, and terminals. Clean or repair as necessary.
4. Verify that 12V is present at the clutch connector when
the PTO switch is engaged.
5. Measure the gap between the rotor and the 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.
Figure 72
1. Brake mounting bolt
B. Using needle-nose pliers, or by hand, take hold of
the tab and remove the shim.
Note: Do not discard the shim until proper
clutch function has been confirmed.
1. Shim
C. Using a pneumatic line, blow out any debris
from under the brake pole and around the brake
spacers.
D. Re-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.
(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 reinstall
the shim and reference the Troubleshooting
section.
•
If the gap is sufficient, proceed to the safety
check in step F.
47
Figure 73
Figure 74
Figure 75