Brake problem...Help

Joined
Feb 27, 2005
Messages
13
Having a brake problem with my 85 FJ60. Was coming home from the store yesterday and went to stop and the brake pedal went straight to the floor. Fortunately there were no cars in front of me. I was able to pump the brakes several time and the pedal went back to normal and she stopped. This happened a few more time on the trip home. Plenty of pads and shoes and no leaks or noticable fluid loss. I assummed it was the master cylinder, so I replaced it and bled the whole system. No change though. Pedal still goes straight to the floor and the only way to gain any brake pressure is to pump them up. No leaks and once they are pumped up, they work fine. Any thoughts on where to begin? Brake booster? Help?

Thanks, Red
 

chitown40

 
 
Joined
Feb 9, 2004
Messages
2,112
Location
Buffalo Grove, IL
Sounds like there is still air in the lines. What order did you bleed the wheels in? I think it is imperative to do the wheel farthest from the m/c first and work your way back to the closest. You probably have quite a bit of air in there since you said you already bled the lines, so go back and try it again and try to push all of the old fluid out of each line until you see new fluid spurting out.
 

60wag

SILVER Star
 
 
Joined
Jun 25, 2003
Messages
1,929
Location
Boulder, CO
Sometimes its tough to get the new master cyl primed/bled correctly. Bench bleeding the master before installing it is supposed to cure it. Since its already installed, you might be able to pumpsome more fluid through it by disconnecting the brake lines at the master. Do a search on bench bleeding to find out how its supposed to be done - I'm not too clear on it.
 
Joined
Feb 27, 2005
Messages
13
Thanks for the advice regarding the bench bleed. You were right, it just needed a good priming. Works great now...

Thanks,
Red
 
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