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American Motors/1978 cj 7 brakes

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Expert: Kevin Pilotte - 7/7/2006


Question
found out that rear was not working, i got them free and was working ok then the fronts started locking up, you can open bleeder valve,or take loose the line, or pull out the proportional valve spring and it frees up,it got disk on front and drums on rear ,thanks David t

Answer
It sounds like you might have a problem with your master cylinder. There is a push rod between the booster and master cylinder. If it is misadjusted, too far out, it can cause the brakes to apply. Another possibility is brake fluid contamination. If the brake fluid is contaminated, the piston seals could swell and cause the brakes to apply. Or the wheel cylinders could be seizing up due to contamination and not releasing. You could replace the master cylinder, flush the hydraulic system and use fresh brake fluid; providing the wheel cylinders and calipers are not contaminated.
Kevin

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Kevin Pilotte

Expertise

I can answer many technical questions relating to AMC vehicles prior to 1979. I also have experience with Rambler & Nash vehicles.

Experience

I am a former AMC technician, service writer and service manager. I have worked in AMC dealers in Illinois in the 70's. After college, I was a Field Service Rep for American Motors Sales Corporation, working out of the Chicago Zone office. I traveled to AMC dealers assisting in the diagnosis and repair of AMC vehicles. I was also the Area Training Manager for DeLorean Motor Company. I have 10+ years as an Automotive Instructor. I have modified and restored
numerous AMC vehicles. I have been working on AMC vehicles for over 30 years.

Organizations
I have been an ASE Certified Master Technician since 1975. This includes L1. I am also currently a Toyota Certified Master Diagnostic Technician.

Publications
I have articles in "American Motoring", the official publication of the American Motors Owners Association. They are the largest AMC club in the world.

Education/Credentials
I have a certificate I printed out from a website.

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