Thread: 1932 ford disc brakes locking up

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Originally Posted by Bob o

I can the push rod is adjustable. There is a tiny bit of play I will adjust the play out of the push rod it might have 1/16 or a bit more of slack right now

If it only has 1/16" of play how did the rod come out of the cup? You need about 1/16" of play between the piston cup and the rod end to ensure that the piston comes back to let the pressure bleed back. Something sounds strange.....

Roger is right, ya need about 1/16 play, as I said B4 put a return spring on it and be done with it !!!!!!

Originally Posted by DA34GUY

Roger is right, ya need about 1/16 play, as I said B4 put a return spring on it and be done with it !!!!!!

What I don't understand is how a guy could get the rod to come out of the cup in the back side of the piston with only 1/16" of play, given the strong internal spring in the MC pushing the piston spool back against the rod. I suppose the answer may be that when the new MC was installed the rod was off center, depressing the piston about 3/8", and wasn't noticed? If you didn't disconnect the rod from the pedal it wouldn't be that hard to do, and it's about the only thing that makes sense to me. If that's the case I'd say it's fixed.

Originally Posted by DA34GUY

Roger is right, ya need about 1/16 play, as I said B4 put a return spring on it and be done with it !!!!!!

The return spring would actually make it worse it would return the brake pedal one it's own without any help from the mastercylinder. Thus causing the pushrod to become disengaged whit the piston. I going to keep an eye on it and if if it comes out again I will add a support for the pushrod so it can't come out