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Old 07-19-2009, 02:51 AM
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Rear drums wont stay adjusted

I have a 96 suburban, the rear brakes are all original (even after 250k miles). It is a 3/4 ton with the 6.5L diesel so it has the big brakes. The brakes were out of adjustment for a long time and when i got in there and adjusted them (one adjuster was frozen, i unfroze it and put grease on it) and now they feel like they are out of adjustment again. It wasnt but maybe 2 months ago that i adjusted them. Since the brakes are original, the adjusters arent on the wrong side or misinstalled, unless it was done that way from the factory which probably isnt likely. The only thing i can think of is that maybe the shoes were worn out of round and they have worn back into a more circular shape and that has caused it to come out of adjustment again. (I hope i explained that clearly, lol) Anyone else have any ideas?

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Old 07-19-2009, 07:18 AM
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If everything looked good when you fixed the adjuster from being frozen up, Then re-adjust them again run them up till you feel some pretty good drag on both sides drive it a bit then check them again. If this is all you done was fix the adjuster and all was good with everything else shoes and things you probably need to go alittle tighter on your adjustment, You might want to re-check to make sure that no springs have came off after you fixed the adjuster. JMO. Cole
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Old 07-19-2009, 06:47 PM
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Those brakes are self adjusting. If they are loosening up, the adjusters are switched side for side.
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Old 07-20-2009, 10:18 AM
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My guess is that you put something back together wrong and the self adjusting arm is not keeping the adjustment from backing off.
I would pull the wheel that was frozen and make sure the adjuster is not able to just spin free.
It worked for a long time, most likely the adjustment was off due to the frozen adjuster. You freed it and it is giving you issues.

When you adjust the brakes be sure to lock them right up then back them off about 6-8 clicks.
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