Mechanics

MASTER CYLINDER

1986 Acura Legend

Brakes problem
1986 Acura Legend 6 cyl Front Wheel Drive Automatic 90000 miles

After replacing the master cylinder, I have no pedal. What do I need to do? I have already bled the brakes, could a bad caliber or brake booster be the problem?
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Davidcarpenter1
November 23, 2008.



You must still have air in system or a leak? Make sure you depress pedal 4/5 times before commencing bleeding? Don't forget if you had master cylinder off only, all the air will be right at the top of system?

BLEEDING
MANUAL BLEEDING
exhaust all vacuum from power unit by depressing brake pedal several times.
Fill master cylinder, then install clear vinyl bleeder hose onto first bleeder valve to be serviced.
NOTE: On manual transmission vehicles where clutch master cylinder feeds from brake master cylinder, bleed clutch cylinder first.

Bleed sequence LF, RR, RF, LR

See 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. Proceed to next bleeder valves.
NOTE: Check fluid level in master cylinder frequently during the bleeding sequence

Dave H
Nov 23, 2008.