Diseazd Posted August 9, 2007 Share #1 Posted August 9, 2007 My rear brakes hang up when I park my 72 z. When I drive it there seems to be aslight drag at low speeds. Any ideas (I've adjusted the shoes with no success) Do I need to replace wheel cylinders ? Link to comment https://www.classiczcars.com/topic/25152-rear-drum-brakes-lock-up/ Share on other sites More sharing options...
BadDog Posted August 9, 2007 Share #2 Posted August 9, 2007 Try checking the backing plate that the shoes slide back and forth on. It may be dirty, rusty, or maybe just not lubed where the shoes contact it and slide. If lube doesn't solve the problem, take the shoes out, use a wire brush to clean those contact areas and get them smoother, and paint w/ epoxy paint. After its all cured, lube those points and reinstall the hardware and shoes :-) Link to comment https://www.classiczcars.com/topic/25152-rear-drum-brakes-lock-up/#findComment-217903 Share on other sites More sharing options...
beandip Posted August 9, 2007 Share #3 Posted August 9, 2007 I sincerely doubt that dirt or the backing plate being rusty is the problem. The return spring will overcome any dirt. I think what you said is the cause. The wheel cylinders are either stuck because of rust or they are frozen in place. If you can take them apart and the cylinder is not pitted , they can be rebuilt. Kits are available. If pitted , replace them. If the piston in the cylinder is stuck or frozen in place it cannot allow the shoes to return to the relaxed position and they will be against the drum. Gary Link to comment https://www.classiczcars.com/topic/25152-rear-drum-brakes-lock-up/#findComment-217911 Share on other sites More sharing options...
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