Front disc brakes on a '70's vintage Dodge van won't release except when I put a c-clamp across the caliper. Once the pedal is pushed, they're locked on again.
It's been parked for over 10 years. I'm resurrecting it long enough to drive it to the local salvage yard or charity lot, so I'm not looking to put a lot of anything into it.
I cleaned up the caliper sliding surfaces. The shoes were new when it was parked. I ground the thin layer of rust off the discs with an abrasive wheel in a drill. The bearings are fine.
Power steering, 6 cyl, manual 3-speed, Tradesman 110 model.
Is this a problem in the master cylinder? Do the calipers need to be rebuilt? What else might it be?
What is *supposed* to retract the pads, anyway?
Thanks,
Mike D.