Adjusting the Parking Brake

Exmark 312, 000 & higher manual Adjusting the Parking Brake, Electric Clutch Adjustment

Maintenance

Service Interval: After the first 100 hours

Every 500 hours thereafter

Check to make sure brake is adjusted properly. This procedure must be followed after the first 100 hours or when a brake component has been removed or replaced.

1.Drive the machine onto a level surface.

2.Disengage the blade control switch (PTO), move the motion control levers to the neutral locked position and set the parking brake.

3.Stop the engine, wait for all moving parts to stop, and remove the key.

4.Raise the back of the machine up and support the machine with jack stands.

CAUTION

Raising the mower deck for service or maintenance relying solely on mechanical or hydraulic jacks could be dangerous. The mechanical or hydraulic jacks may not be enough support or may malfunction allowing the unit to fall, which could cause injury.

Do Not rely solely on mechanical or hydraulic jacks for support. Use adequate jack stands or equivalent support.

5.Remove the rear tires from the machine.

6.Remove any debris from the brake area.

7.Rotate the drive wheel release handle to the “released” position. Refer to the Drive Wheel Release Valves section in Operation.

8.Measure the overall length of the compression spring. The correct length should be between

1 1/2–1 9/16 inches (3.8–4.0 cm). If the spring length is within this range, no adjustment is needed. If it is not, proceed to step 9.

9.Hold the threaded rod end with a tool and adjust the lock nut until the spring length is between

1 1/2–1 9/16 inches (3.8–4.0 cm) see Figure 30). Do Not allow the cable to turn when the nuts are being loosened.

Figure 30

Left Hand Brake Shown

1.	Cable anchor	5.	Caliper
2.	Hold threaded rod here	6.	Compression spring
3.	Measure	7.	Threaded rod
4.	Lock nut	8.	Hub

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.

Electric Clutch Adjustment

No adjustment necessary. However on units with 60 inch decks, when the clutch brake has worn to the

0, 312, 000 & higher specifications

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