Baffled on brakes....Need a little help !!

I replaced everything today on a 1963 CJ5 for my winter resto project..

anyhow new wheel cyclinders..lines .hoses..master cyclinder..

Cant get the brake pedal to hold the pressure..I bled the brakes starting from the passenger wheel first and went to the d.wheel front drivers then passenger wheel..didnt work ..I tried every combination and a gallon of fluid..I pulled the wheels off again and checked the cyclinders dry as a bone...no leaks ...you guys and gals think it might be the master cyclinder ??? ..
All these parts are Wagner new stuff no re-built or recon stuff...

This is a first for me on this issue ..I never had trouble like this especally when putting all new parts on...
Thanks...

 

Did you bench bleed the master cylinder? Also you said a gallon of fluid ? are you refilling the master cylinder or did you just fill it once?

 

If you mean the pedal goes down all the way, yes, it may be the master cylinder.

If it still has air in it, it would feel spongy, but if not then maybe a bad seal?

But if it works well enough to bleed the system, I would wonder...

Another possibility is that you need to adjust the shoes at each wheel. If there is too much slack you may 'hit bottom' with the pedal before the shoes are all contacting the drums. In other words, the shoes are just moving in and out without pushing hard up against the drum(s) and are absorbing all the master cylinder's range.

Good luck.

Pete

 

I bench bled the M/C ....

Also adjusted the brakes twice ..once before I put in fluid and then after I checked the wheel cyclinders again...I am at a loss...

 

the ports in the MC may be reversed. mine were and when hooked up it drove me nuts trying to get some pedal...

 

That makes a little cents $$ ........I will look at that tommorrow..hate to waste a good frame and motor because of the brakes...

 

It is all new.. NO REBUILT stuff on my brakes its always new...

Its on a 63 single stage m/c....Just came in ....

I pump it up ,,,it will hold...do something else I go and press the pedal it goes 3/4 the way down..

I checked the wheel cyc again and adjusted the brakes for the third time, still wont keep a pedal..

I checked every fitting and wheel cyclinder four times..

I think the master cyc is ****..I even took and bled the m/c again and hooked it up , bled the brakes again ..I used a bunch of brake fluid today over this...still wont hold a pedal.......

 

Any way you can disconnect the line from the MC, plug it and try? That would tell you if it was bad, or something down line. Elimintate the components until you find the culprit!

 

Good point !!!! I will try it in the am.. Thanks

 

"I pump it up ,,,it will hold...do something else I go and press the pedal it goes 3/4 the way down.."


Are you sure you don't have a shoe or adjuster hanging up somehow? A parking brake transfer bar out of place? If not, then I think it must be a bad seal in the master.

Pete

 

A simple trouble shooting method is to pop a set of vice grips on the soft lines. Try the pedal again. If it is soft, then the problem is between the grips and the MC. If it is hard, then pull one set off at a time, checking when the pedal goes soft. If you have good pedal till you remove the right front grips, then that is where your problem is.

 

Good advise jeepdaddy..!!

I finally got it ..after readjusting the brakes five times and continue-ation of bleeding the brake lines it finally held..

The only thing I can figure is I had a lot of air in the lines or I had a brake shoe out of adjustment...

Appreciate the help guys..

 

I believe so ??????????? Hell I used almost 3/4 of a gallon of brake fluid but I got it