Maintenance
Do Not allow the cable to turn when the nuts are being loosened.
Electric Clutch Adjustment
No adjustment necessary. However 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 31
Left Hand Brake Shown
1.
Cable anchor 5.
Caliper
2.
Hold threaded rod here
6.
Compression spring
3.
Measure
4.
Lock nut
7.
Threaded rod
8.
Hub
1.
Armature
2.
Field shell
3.
Rotor
4.
Brake mounting bolt
Figure 32
5.
Brake spacer
6.
Re-gap shim
7.
Brake pole
10. Disengage the park brake. Turn the wheel hub by hand in both directions relative to the caliper; no drag of the caliper pad on the wheel hub is desired.
11. If there is no movement between the hub and the caliper then repeat the adjustment (drive release valves must be in the “released” position on the hydros).
12. After adjusting the brakes on both sides of the mower, cycle the brake handle a minimum of six times to allow the cable to seat into the sheath and mounting tabs.
13. Recheck the spring length; engage the park brake
and repeat steps 8 through 11 if the length is not
in the correct range.
14. Rotate the drive wheel release handle to the
“operating” position. Refer to the Drive Wheel
Release Valves section in Operation.
15. Install the rear tires and torque lug nuts to 90-95 ft-lb (122-129 N-m).
16. Remove jack stands.
Removing the Shim:
1. Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake. Allow the machine to cool completely before starting these instructions.
2. Using a pneumatic line, blow out any debris from under the brake pole and around the brake spacers.
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 armature.
If the gap is greater than .04 inch (1 mm), proceed with the following steps:
A. Loosen both brake mounting bolts one-half
to one full turn (see Figure 33).
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.
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