Exmark lazer Z E-Series 312 - Manual (Page 40)

Maintenance
Adjusting the Parking Brake
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
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