I have been working on my brakes for a couple weeks off and on and am still having the same problem. What my setup is.. 71 FJ55 and I just converted to discs from a 85 FJ60, knuckles everything and am using v6 calipers and the brake booster and master from the same FJ60. The master cylinder is practically brand new, AISAN, still nice and blue in color. What my problem is I have no front brakes whatsoever.
Some thoughts I had were the since my 55 has 2 wheel cylinders per wheel in the back compared to the 60 which only had one per rear wheel that too much fluid was going to the rear wheels.
So I unhooked the back brake line and plugged it, bled the brakes and still had no front brakes... none at all.
i took the master cylinder apart and everything is fresh and brand new.
the rear cylinders have been overhauled recently and all lines are clean and rust free and flushed with new fluid.
My wife says when she is pumping the brakes, when i start with the pass. rear wheel cylinders it feels like it should, first pump go down to the floor, then next few pumps builds up and then the bleeder is opened, the pedal goes to the floor. This is the same for the drivers side rear wheel cylinders, but when I move to the front, she says it does not build pressure like it should. There could be air in the front lines somewhere but we bled it for a long time and went through almost a quart of fluid for the front brakes. and still nothing.. the front brakes don't engage at all.
Does anyone have any thoughts? Something I noticed when I had the master cylinder apart is the front piston, the seals on it were both facing opposite directions while the rear pistons seals were both facing the same direction. like...
<----- front booster --->
~~~___\____/~~~~__\____\
~~~ is the spring
____ is the top of the piston
\ is the plunger seals
I hope that makes some sense
I didn't know if all the seals were supposed to face the same direction.
Some thoughts I had were the since my 55 has 2 wheel cylinders per wheel in the back compared to the 60 which only had one per rear wheel that too much fluid was going to the rear wheels.
So I unhooked the back brake line and plugged it, bled the brakes and still had no front brakes... none at all.
i took the master cylinder apart and everything is fresh and brand new.
the rear cylinders have been overhauled recently and all lines are clean and rust free and flushed with new fluid.
My wife says when she is pumping the brakes, when i start with the pass. rear wheel cylinders it feels like it should, first pump go down to the floor, then next few pumps builds up and then the bleeder is opened, the pedal goes to the floor. This is the same for the drivers side rear wheel cylinders, but when I move to the front, she says it does not build pressure like it should. There could be air in the front lines somewhere but we bled it for a long time and went through almost a quart of fluid for the front brakes. and still nothing.. the front brakes don't engage at all.
Does anyone have any thoughts? Something I noticed when I had the master cylinder apart is the front piston, the seals on it were both facing opposite directions while the rear pistons seals were both facing the same direction. like...
<----- front booster --->
~~~___\____/~~~~__\____\
~~~ is the spring
____ is the top of the piston
\ is the plunger seals
I hope that makes some sense
I didn't know if all the seals were supposed to face the same direction.
