Saturday, March 29, 2014

Import Hydraulic Brake Bleeding


NOTE: For vehicles equipped with Anti-Lock Brake Systems (ABS), see ANTI-LOCK BRAKE SYSTEM article in this section.

BLEEDING

MANUAL BLEEDING

Bleeding may be done either by using pressure bleeding equipment or by manually pumping brake pedal and using bleeder tubes.

1. On Jaguar and Isuzu models, start engine and run at idle. On all other models, exhaust all vacuum from power unit by depressing brake pedal several times.

2. Fill master cylinder, then install clear vinyl bleeder hose onto first bleeder valve.

NOTE: On manual transmission vehicles where clutch master cylinder feeds from brake master cylinder, bleed clutch cylinder first.

Look into BRAKE LINE BLEEDING SEQUENCE table. Place other end of hose in clear glass jar.

3) Partially fill jar with clean brake fluid, so end of hose is submerged in fluid. Open bleeder valve 1-2 turns. Depress brake pedal slowly through its full travel.

4) Close bleeder valve, then release pedal. Pump pedal several times to push air toward wheel cylinders. Repeat procedure until flow of brake fluid is clear, and shows no signs of air bubbles. Continue to next bleeder valves.

NOTE: Check fluid level in master cylinder frequently during the bleeding sequence.

TANK PRESSURE BLEEDING

1. On JAGUAR and ISUZU models, start engine and run at idle. On all other models, exhaust all vacuum from power unit by depressing brake pedal several times.

2. Clean the master cylinder cap and surrounding area. With pressure tank at least 1/3 full, connect tank to master cylinder using proper fitting adapter(s).

3. Attach bleeder hose to first bleeder valve

See BRAKE LINE BLEEDING SEQUENCE table. Place other end of hose in a clean glass jar. Partially fill jar with clean brake fluid, until end of hose is submerged in fluid.

NOTE: On manual transmission vehicles where clutch master cylinder feeds from brake master cylinder, bleed clutch cylinder first.

4) Open release valve on pressure bleeder. Unscrew bleeder valve 1-2 turns, noting fluid flow.

When fluid flow into container is clear, and free of bubbles close the bleeder valve.

5) Bleed remaining cylinders in correct sequence and in the same manner. Remove pressure tank from master cylinder and check fluid level of master cylinder reservoir.




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