brake help
Thread Starter
Racer
Joined: Nov 2006
Posts: 495
Likes: 1
From: Lubbock TX
brake help
I just bought a new power brake booster and master cylinder and all four calipers are new on my 75 vette im restoring. the brakes keep locking up after a couple minutes of driving. i adjusted the pushrod on the booster and its all the way in, but the brakes still lock up. I cant figure out what is going on...
Advanced
Joined: Nov 2006
Posts: 73
Likes: 0
From: Linden NJ
1st check to see if the pads arent contaminated, clean if needed. You didnt say weather you replaced the hoses or if this problem was there before you replaced the pad and rotors. Check the hoses to make sure that they are not binding, and make sure that the brake fluid flows both ways. Some times they deteriorate internally and act like a check valve. The fluid will go out to apply pr4essure , but it cant return to release pressure causing the lock up. Finally make sure that the proportioning valve is working properly. This is always an overlooked item with brake problems.
good luck........
good luck........
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Sounds like you have the wrong M/C and the push rod is holding it part way on. Loosen the 2 nuts holding the M/C on the booster when they lock up and see if that releaves the pressure. If not, crack a bleeder screw at a caliper, maybe your rubber hoses at shot.
