Brake bleeding problem
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Brake bleeding problem
Help!
I have a 1986 F-150 2wd and I replaced the brakes about two years ago. I didn't do the master cylinder at that time, though I probably should have just done it when I had everything else torn up. I did cylinders, caliphers, shoes, discs, rotors and drums (turned).
Two weeks ago, my dash brake light wouldn't go out, and I noticed leakage from the master cylinder at the mounting point.
I replaced the cylinder with a rebuilt. I Bench bled the cylinder before mounting. Then I tried to bleed the system starting at the right rear. I am using a tubing and bottle NAPA tool. All of the wheels are ok except the left rear. I keep getting bubles in the bleed line no matter how much fluid I pump through.
I went back to the master cylinder and bled it with plastic barbed fittings and tubing, puming the fluid back into the reservoir.
Then bleeding again, and same story, left rear bubbles.
I see no evidence of leakage anywhere.
Any ideas anyone?
Jay
I have a 1986 F-150 2wd and I replaced the brakes about two years ago. I didn't do the master cylinder at that time, though I probably should have just done it when I had everything else torn up. I did cylinders, caliphers, shoes, discs, rotors and drums (turned).
Two weeks ago, my dash brake light wouldn't go out, and I noticed leakage from the master cylinder at the mounting point.
I replaced the cylinder with a rebuilt. I Bench bled the cylinder before mounting. Then I tried to bleed the system starting at the right rear. I am using a tubing and bottle NAPA tool. All of the wheels are ok except the left rear. I keep getting bubles in the bleed line no matter how much fluid I pump through.
I went back to the master cylinder and bled it with plastic barbed fittings and tubing, puming the fluid back into the reservoir.
Then bleeding again, and same story, left rear bubbles.
I see no evidence of leakage anywhere.
Any ideas anyone?
Jay
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Joined: Jun 2006
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Thanks for the reply. I will pay attention to the bleeder screw. I did pull the drum and didn't see any obvious leaks at the cylinder. The other think that I forgot to mention is that if I remove the cover on the master cylinder and have someone pump the brakes, I get a little geyser of fluid in the rear brake reservoir. According to my Ford manual this is one of the diagnostic indicators that I have air in the lines.
Jay
Jay
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BigMikeUGA
Brakes, Steering, Suspension, Tires, & Wheels
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May 3, 2012 02:11 PM
