Brake Maintenance
Adjusting the Parking Brakes
Adjust the service brakes when there is more than 13 mm
(1/2 inch) of free travel of the brake pedal, or if the brakes
slip. Free travel is the distance the brake pedal moves
before you feel braking-pedal resistance.
1.
Prepare the machine, refer to
Maintenance (page 52)
.
2.
Release the parking brake.
3.
Use the wheel-motor backlash to rock the drums back
and forth to ensure that they are free, prior to and
after the adjustment.
4.
Lightly press the brake pedal; and measure the
distance the pedal moves without resistance (
Note:
Adjust the brakes if there is more than 2.5 cm
(1 inch) of free travel (
) of the brake pedal,
or if more parking-brake force is required.
g026816
Figure 143
1.
Free travel
5.
To reduce brake pedal-free travel, loosen the front
jam nuts on the threaded end of each brake cable
(
g375942
Figure 144
1.
Front jam nut (brake cable)
2.
Rear jam nut
6.
Tighten the rear nuts to move the cable backward,
until brake pedal has 6 to 13 mm (1/4 to 1/2 inch)
of free travel (
), before the parking brake
engages the wheels.
7.
Tighten the front jam nuts, ensuring that both cables
actuate the brakes simultaneously.
Note:
Ensure that the cable conduit does not rotate
while tightening the jam nuts.
Adjusting the Parking-Brake Latch
If the parking brake fails to engage and latch, an adjustment
to the brake pawl is required.
1.
Prepare the machine, refer to
Maintenance (page 52)
.
2.
Loosen the 2 screws securing the parking-brake pawl
to the frame (
70