front brakes dragging excessively

[jamie]

i did the yj booster upgrade recently, and until today, i havent driven the jeep. the front disks were smoking when i got home. i re used the cj manual master cylinder and yj booster. it feels like the brakes are on all the time. do i need to bleed the brakes even though i didnt introduce any air into the lines? im confused

 

[jamie]

frozen caliper might be the culprit. i cant move the piston in. but i dont get why it gets worse when you drive? oh well, time to find some new calipers and hoses.

 

[Posi]

I'm thinking you have no play in your brake pedal. If so try adjusting your brake rod to relieve the pressure.

 

[Old Dog]

the front disks were smoking when i got home. i re used the cj manual master cylinder and yj booster.

sounds to me like this combo isn't playing well with eachother.
I think you will need a power master.

 

[Posi]

Yes, it’s a possibility manual brakes need 10 psi and the disc need 2. However I would check the brake rod first being the easiest to do. The brake rod adjustment has been an issue that needs to be address on more then a few yj booster swaps.

 

[jamie]

the brake rod that connects to the pedal? i have shortened that already. im confused because it gets worse if i drive. its almost like im slowly applying more and more pressure until the wheel will hardly spin. could my booster be messed up? my calipers were not frozen, as i first thought.

 

[Posi]

If you have 1/8” play in the pedal and the rod is working as it should then I would check the combo valve as old dog mentioned. You could check the bone yard for a Jeep disc/drum combo to replace your drum/drum valve.

 

[jamie]

my jeep already has a disk front/ drum rear which i believe is factory. it has a prop valve on the frame rail. i went to the bone yard this afternoon and took apart a yj brake set up. i might need to shorten the one i have

 

[Posi]

my jeep already has a disk front/ drum rear which i believe is factory. it has a prop valve on the frame rail. i went to the bone yard this afternoon and took apart a yj brake set up. i might need to shorten the one i have

If it came from the factory the combo valve is drum/drum. Jeep never offered front disc brakes on a 76.

What exactly are you using/shorten from the yj set-up you just picked up?

 

[jamie]

im going to shorten the pushrod that goes from the booster to the master cylinder. i feel like its too long and constantly applying pressure to the wheels.