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rear brakes locking up


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russ71satellite
Anonymous Poster
russjennings2@bellsouth.net

Mar 20, 2007, 7:54 PM

Post #1 of 3 (2862 views)
rear brakes locking up Sign In

1990 Ford Aerostar, rear brakes locked up for no apparent reason, after putting new drums on. Emergency brake was not on. Nothing was touched in the brakes, only drums were put on.

Could air in the lines cause this? Porportioning valve, perhaps?

Thanks for any help...


Guest
Anonymous Poster

Mar 20, 2007, 8:02 PM

Post #2 of 3 (2860 views)
Re: rear brakes locking up Sign In

some additional info...only the driver side rear brake locked up.
I don't think the adjuster was too far out, because the new drum fit on pretty easily without any adjustment being necessary.

the wheel cylinder isn't leaking, and seems ok, when I manually make it push fluid. All springs, etc were in proper position.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 22, 2007, 5:50 AM

Post #3 of 3 (2855 views)
Re: rear brakes locking up Sign In

If the self adjusting system was working well new drums would make the brake too tight and warm up. The warm or hot brake won't grab as well as the cooler one.

The new brake drums should have come new with some method of keeping them from rusting while in box and should be cleaned as directed on box or I've always used brake cleaner before installing them which is becoming a no no in this state as they try to eliminate the need for anything that can pollute which it does. Don't get brake cleaner on any rubber parts as it is not compatible.

Both wheels should spin freely by hand and if not find out why, T







 
 
 






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