Question about 1988 GMC K3500

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Cant get rear brake drum off - 1988 GMC K3500

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Does that truck have a floating axel? That is where you have the center hub with about 8 bolts that hold the axel shaft in. If that's the case, I'm pretty sure, the hub and drum have to be removed as an assembly. If there are no center bolts and it's just the end of the axel and it is stuck on the axel you may have to heat it with an oxygen/accetylne torch. If it's loose on the axel and the shoes are holding you have to go in through the hole in the backing plate (on the bottom) and back the adjuster off. The tricky part is holding the automatic adjuster arm out of the way so you can back the adjuster off. If you go in the hole with a screwdriver or brake adjusting you will only be able to turn that little wheel one way and that is tighter and you should hear the adjusting arm click. STOP you are going the wrong way. Take a small screwdriver and go under the adjuster on the back side (toward the rear of the vehicle), you should be able to feel the adjusting arm. Gently push the arm out of way, it won't move much, at the same time back the adjuster off. Good luck!

Posted on Dec 12, 2009

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Assume taken handbrake off? if so, ridge on drum is catching on shoes so need to release through slots in rear backplate

Posted on Dec 12, 2009

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