4.
Tighten the locknut until the spring washers are flat,
and then back off a 1/4 turn to properly set the preload
on the bearings (
).
Important:
Make sure that the spring washers are
installed correctly as shown in
.
5.
Install the dust cap (
).
Figure 66
1.
Spring washers
3.
Dust cap
2.
Lock nut
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, the
shim can be removed to extend the clutch life.
Figure 67
1.
Armature
5.
Brake spacer
2.
Field shell
6.
Re-gap shim
3.
Rotor
7.
Brake pole
4.
Brake-mounting bolt
Removing the Clutch Shim
1.
Shut off the engine, wait for all moving parts to stop,
remove the key, engage the parking brake, and 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 68
3.
Check the condition of the wire-harness leads,
connectors, and terminals.
Note:
Clean or repair as necessary.
4.
Verify that 12V is present at the clutch connector when
the blade-control switch (PTO) switch is engaged.
5.
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 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 69
1.
Brake-mounting bolt
B.
Using needle-nose pliers, or by hand, hold the tab
and remove the shim.
46
