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Rear brakes keep locking up

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Old Jan 24, 2023 | 12:27 AM
  #1  
ApexT150's Avatar
ApexT150
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Rear brakes keep locking up

Im ashamed to say this but ive been chasing this problem for a month now and i still cant find the problem.
i replaced my rear brake shoes ,wheel cylinders , the whole rear drum springs and the flexible brake lines.
my brakes only lock up when i brake hard , and when they do i have to bleed out the nipple to release the pressure from the whleel cylinder.
1987 ford f150 5.0 v8 Manual
 

Last edited by ApexT150; Jan 24, 2023 at 03:54 PM. Reason: Important information:1987 ford f150 5.0 v8 manual
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Old Jan 24, 2023 | 06:25 AM
  #2  
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JWA
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From: Reynoldsburg, Ohio
You might want to list WTF you're working on!!!

This sounds like an issue with the offending wheel cylinder if it only happens to just one cylinder, if both rear wheels then possibly a restriction between the master cylinder and wheel cylinders.

If the wheel(s) lock up does it seem to release after it sits a while?
 
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