82 300TD brake calipers wont collapse

I was trying to do the simple task of replacing the front brake pads on my '82 300 TD wagon. I was able easily able to get one of the pads out, but the other one, the one closest to the car, I was unable to get out. When I would try to push the current brake pad back into the caliper to make room for the new thicker pad, it seemed like the pad was frozen in place. It would not budge. I tried tapping on it with a hammer, blasting it with dynamite and it would not move. Is there something that I am missing, or does this mean I probably need to get a new set of front calipers?

Forums

Body and Interior Specific Aid

Chassis Model Number

W123

3 possible causes

It is most likely the calipers are rusted internally. This can happen when brake fluid is not changed every one to two years. But this could also be caused by deteriorated flexible brake hoses (not allowing the fluid to escape the caliper). Before ordering replacement calipers disconnect the hose and try again to collapse the piston. If it still won't move you will know for sure it is the caliper. Although very rare, I have also seen a faulty brake master cylinder lock up the calipers.

We offer a good price on a set of rebuilt front calipers without a core charge. CLICK HERE to order.

Re: 82 300TD brake calipers wont collapse

Thanks for the info. I will try disconnecting the brake hose when I get home tonight and see if it will budge. If it does budge when I disconnect the brake hose then what do I do, I guess I would order a new brake hose?