Parking Brake Bleeding; Parking Brake Adjustment - Manitowoc Grove 5540F Service Manual

p0085
Front Axle
1. Engage the parking brake and shut off the engine. Block
the rear wheels on both sides.
2. Attach a tube to the one of the wheel bleed screws A
Figure 9-8 ensuring that the free end of the tube is
immersed in fluid contained in a suitable container.
3. Open the brake bleeder screw and apply one rapid
stroke of the pedal followed by three rapid short strokes
from the pedal half way down. After the third short stroke
allow the pedal to return quickly to its stop.
4. Continue bleeding normally until all air is expelled. Close
the brake bleed screw with the pedal fully depressed.
5. Repeat steps 2 through 4 for the other side.
p0086
9-6
Rear Axle
Bleed Screw
FIGURE 9-7
Front Axle
Bleed Screw
FIGURE 9-8
Published 10-21-2010, Control# 198-04
5540F/YB5515 SERVICE MANUAL

Parking Brake Bleeding

NOTE: Before working on the brake system, make sure
the crane is on level ground and that all four wheels
are chocked.
NOTE: The accumulator must be charged before this
operation can be performed. If you are not sure the
accumulator is charged, engage the parking brake,
start the engine and let is run for several minutes.
1. Engage the parking brake and shut off the engine. Block
all wheels on both sides.
2. Attach a tube to the bleed screw on the parking brake
Figure 9-9 and place the other end in a suitable
container.
3. Open the bleed screw, then disengage the parking
brake.
4. Observe the fluid exiting the hose. When there is no air
or fluid being released, close the bleed screw with the
parking brake still disengaged.
5. Engage the parking brake.
6. Repeat steps 3-5 as needed until no air is release from
the fluid.
p0828

Parking Brake Adjustment

Before adjusting the parking brake discs, make sure that
the machine is on level ground. Place chocks on both
sides of the four tires. Remove the ignition key. If these
precautions are not adhered to, the crane could run you
over while performing the adjustment.
When the parking brake is engaged and it will not hold the
crane in position it may be necessary to adjust the parking
brake disc pads.
Parking Brake
Bleed Screw
FIGURE 9-9
WARNING