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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

brake locking up

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Old Mar 9, 2009 | 08:00 PM
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scottddove
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brake locking up

my 86 f350 dually has developed a brake issue. When coming to a normal stop the drivers rear brakes will lock up and slide to a stop. This comes and goes and doesn't do it all the time. what could be causing this??
 
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Old Mar 9, 2009 | 08:17 PM
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A Master Cylinder can cause this problem.

Also binding parts in the drum, lack of lubricant, broken brake shoe, bad wheel cylinder.

etc...


First thing I'd do is check the rear brakes. Check for cracked or broke shoe, worn parts, leaking wheel cylinder etc.
 
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Old Mar 9, 2009 | 08:20 PM
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Contaminated shoes are a very common cause. This can come from a leaky wheel cylinder or a bad seal letting rearend oil get on the shoes.
 
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Old Mar 10, 2009 | 11:51 PM
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my truck used to do the same thing but it was only the left rear brake. I had a blown out wheel cylinder on that side. Replaced it and it still locked up bad. Replaced all the brake hardware on the rear and the problem went away.
 
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