New problem with the disc brakes...HELP

[John Burke]

As if I don't have enough problems, for some reason the disc brake caliper assemblies I put on the 49 Dodge won't return after using the brakes..I have a firewall mounted, dual chamber master cylinder with a power booster from Speedway. I did not have this problem with the old drum set I took off....any suggestions welcome:( ...John

[Paul Beard]

Check and see if the master cylinder has a one way check valve. Said valve does not let fluid back into the master cylinder.

[rearview]

Also, make sure the rod from the booster to the MC is allowing the MC to return full stroke.

[claybill]

some of the calipers are made in china...

they look the same, but have some slight differences...

like the bleeder screw is located differently and will not allow 100% air bleeding in some installations....(it cost me $1200 to find this out!)

to get full air bleeding the caliper must be bench bled then installed on disc.

this info may help..

bill

[woodscavenger]

I agree with rearview about checking the pedal return. If the rod cannot come back fully the brake system will remain pressurized. I had to fiddle with this a little when I built my custom dual chamber MC setup.

[billwillard]

You can't bench bleed a caliper. You can however put a caliper on the wrong side and they won't bleed. The bleed hole must be at the top and if not you have them on the wrong side.

Bill

[mikesinky]

if you have old brake hoses sometimes they will pinch off on the return and wont allow the fluid to go back to mc.

[John Burke]

It was'nt the push rod to the master cylinder..exactly...but rather that small nubbin between the booster unit and the MC.....we shortened that baby and they work great now....John:D

[John Mulders]

Hi John,

good te hear it was a small problem and is solved now !

John