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WET DISC BRAKE BLEEDING
PROCEDURE
NOTE: Rear wheel brakes must be bled prior to
rear tire installation.
1. Be certain the hydraulic brake supply (steering
circuit) is operating properly.
2. If necessary, charge the brake system accumula-
tors. Refer to "Hydraulic Brake Accumulators",
earlier in this Section of the manual.
3. Be certain bleeddown valves on brake accumula-
tor manifold are closed.
4. Check hydraulic tank oil level and correct if nec-
essary.
5. With the wheels securely blocked, start the engine
and allow accumulators to fill.
6. Slowly depress the brake pedal until the service
brake is partially applied.
J5-14
Rear Wheel Brakes:
7. Crack open the O-ring plug located next to the
cooling oil port and brake apply port on the brake
backplate. Close plug after oil runs clear and free
of bubbles. Repeat for remaining wheel.
NOTE: The other cooling line has a single hex plug
located adjacent. DO NOT use this plug for bleeding
brake.
Front Wheel Brakes:
NOTE: The front wheel brakes are equipped with a
diagnostic coupler on the brake backplate. A hose with
a mating fitting can be attached and used to direct the
oil into a container during the bleeding process.
8. Attach a hose to the diagnostic coupler on the
brake backplate (brake apply pressure circuit).
9. Slowly depress the brake pedal until the service
brake is partially applied.
10. After oil stream is clear of air, remove hose from
coupler. Release brake pedal.
11. Repeat steps 8 through 10 for the remaining
wheel.
12. Shut down engine, allow steering accumulators to
bleed down and check hydraulic tank oil level.
Disc Brake Assembly
J05018 03/01
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Troubleshooting
