Parking Brake Bleeding Procedure - Komatsu 930E-2 Shop Manual

PARKING BRAKE BLEEDING PROCEDURE

1. Apply the parking brake, put selector switch in
NEUTRAL, place the Rest switch in the ON posi-
tion, turn the key switch OFF to shut down the
engine, and allow approximately 90 seconds for
the steering accumulators to bleed down. Confirm
the steering pressure is released by turning the
steering wheel - no movement should occur.
Block the truck wheels.
2. Block the truck wheels securely to prevent move-
ment when the parking brake is released.
3. Open the rear axle housing access door, remove
the cooling air duct tube and open access covers.
4. Be certain the brake accumulator bleeddown
valves are closed.
5. Start the engine and allow the steering system to
fully charge (pump unloads). Turn the parking
brake to the OFF position.
J7-6
6. Connect a clear plastic hose to the parking brake
bleeder screw. Place the other end of hose in a
container.
7. Slowly open bleeder valve and allow hydraulic fluid
to run until clear and free of bubbles. Close
bleeder screw securely.
8. Repeat steps 6 & 7 for the other parking brake.
9. Shut down engine.
10. Remove brake bleed equipment, close axle hous-
ing cooling air ducts and reinstall duct tube at
door.
Parking Brake J07010 12/98