brakes

[Davidbolam]

Took my car for a shake down run tonight (in the dark) with my mate. Everything went really well apart from the brakes kept binding on. I had to stop on 3 occasions to let the brakes cool down/release. It seems to be the rears. I had already backed off the handbrake to the point where this doesn't work so I know its not that causing the problem.

I have an inline pressure switch to activate the brake lights and when the brakes are locked on the brake lights remain on?

Has anyone got any suggestions?

Cheers

David

p.s my car has now done 10 miles!!!

[Stot]

Do you have a brake proportioning valve of some kind? Is the pressure switch on the rear line after this? It could be sticking and not releasing pressure back to the master cylinder.

Cheers
Stot

[Davidbolam]

Originally Posted by Stot

Do you have a brake proportioning valve of some kind? Is the pressure switch on the rear line after this? It could be sticking and not releasing pressure back to the master cylinder.

Cheers
Stot

There is no valve in place. Just the switch.

David

[robo]

If pressure is remaining in the circuit the piston in the master cannot be returning fully. So it can only be brake master related, this could be a piston sticking or the brake pedal not allowing it to return .

Bob

[voucht]

Originally Posted by robo

If pressure is remaining in the circuit the piston in the master cannot be returning fully. So it can only be brake master related, this could be a piston sticking or the brake pedal not allowing it to return .

Bob

You've been quicker than me!

[K4KEV]

What about the pivot point of your brake pedal which would be the same as the mc piston sticking.

[voucht]

Hi David,
How did you adjust the master-cylinder push-rod/clevis assembly? How did you adjust the brake pedal position? Sometimes, after having adjusted the brake pedal stroke and position, there may be apply a pressure applied on the master-cylinder, even when the brake pedal is released. Not enough to lock the brakes when cold, but it makes the all system heating up, and can lead to a break locking after a while (and even a brake loss if overheating). So perhaps you should try to momentary put your brake pedal as far back at possible (completely released with no pressure on the M/C), even if it is not comfortable, but just for checking if you still have this brake locking problem in these conditions (when you are sure the pedal is not applying any pressure on the M/C when released).