1934 truck trouble

hi guys i got trouble with brakes locking up in front disk brakes going down the road would they be getting to hot or what

 

You may need to check the length of your brake rod from the pedal to the master cylinder. It may not have any free travel which could hold a little pressure on your brakes.

 

how much play should there be

 

Probably about an inch or so free travel. If they lock up after you start driving it try pulling over and check to see if your brake lights are on. If they are on and you have a hydraulic brake light switch versus a mechanical switch then your master cylinder most likely is applying some pressure to to brake system. Shorten the brake rod if this is the case.

 

Could be a restriction in a hose too. It could allow brakes to go on but not off.

 

More details eh? All the brakes, just the discs, just the fronts? What 34 truck for Christ's sake? What's the brake system - 1934 + discs = somebody's been monkeyin'.
Jack up each end and see if sumpin doesn't spin. Report back.

 

Probably the most common problem on new hotrods is the piston can't return all the way inside the Mcyl preventing the fluid from returning. Sometimes it's the pedal push rod needs adjusting so that it does not touch the piston at rest. Sometimes the lack of a separate pedal return spring allows the weight of the pedal to prevent it from FULLY retracting. There needs to be a space between the pedal rod and the back of the Mcyl piston. It doesn't take much to prevent the flow of the fluid back into the M/cyl. With out that space at rest you are effectively pumping the brakes until they lock up.

 

check to see if the pedal is returning all the way my front brakes were locking up on my truck it was a bad power booster not releasing

 

went out to work on brakes ground down thouht maybe to thick that did not do it shorten the rod it did not do it the brake cinder not hot got new hoses on what would keep the fluld in the front brakes i am stuck could it be a bad brake cylinder

 

All the rods I've owned had the brakes in order, but in my dealing with boat trailer brakes, there is a difference (which I can't remember) between m/c used for disc and one for drums....a valve inside that lets the fluid return.

Do automotive m/c have this difference also?

 

can you put that another way? or in english?

 

i have about a 1' from the master cylinder it the brake light does stay on till ya bleed the front brakes by the way it is a 34 ford dont know what makes the diffence brakes is brakes disc front drum back

 

common issue is rubber lines are collapsing internally,are you releasing pressure at calipers? try cracking line at point where steel line meets flexible hose.

 

Yeah OK, brakes is brakes. Them's the breaks. Brake light stays on until you bleed the front discs is a clue that pressure is not releasing back at the master or as someone said due to an internally collapased hose or stuck caliper. If rear bleeding dosen't release the pressure then you've isolated the problem to the fronts. Can you narrow it down to just one of the front wheels? Did this problem show up out of the blue after brakes had worked normally for some time? Is this a newly put together brake system that's not working from the start?
People are here to help but you're giving us damn little to go on so you'll get random answers about "I had a problem like this once and this is what fixed mine".

 

Yes the caliper slides or piston could be sticking,depending on what calipers u used.is master above or below the floor.If you mixed dot 4 and 5 brake fluids it will cause rubbers to swell when hot and lock up.Before you know it ,theres 20 dollars missing from your wallet ,Ive seen it a hundred times.