Toro 74997 Operator's Manual page 50

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 70
4. Check the condition of the wire-harness leads,
connectors, and terminals. Clean or repair them as
necessary.
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.
Figure 71
1. Brake-mounting bolt
B. Using needle-nose pliers, or by hand, remove the
shim.
Figure 71.
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).
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 in
Figure 73 and
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
50
Figure 72
Figure 74.
Figure 73
Figure 74