Model: Jeep Cherokee 4wd 6 cylinder 4.0 L, 1996.

The brakes started to rub on the cherokee, so I checked out the calipers and ended up replacing them. After replacing the calipers bleeding all lines correctly and such, I have an issue. The pedal goes straight to the floor. If the motor is off, you can build the pedal a little after pumping, but nothing like that when the engine is running. I've checked and rechecked for leaks, disconnects, and all that, I've bled the lines again and again. I narrowed it down to the master cylinder getting some blow-by when the pedal is depressed, so I bit the bullet on the master cylinder, confident that this was the issue. Bench bled the master, put it on, and bled all the lines again. Pedal still goes to the floor.

I'm at the end of my knowledge here, guys, any of you ever have this issue?

NOTE: this is a non-ABS model.

 

back brakes.
anytime i have back brake trbl the pedal goes to the floor. dont know why front dont work but thats it. i drove my 2000 home carefully like that, fixed back leak,then a front leak started. replaced a line, never bled them. good strong pedal now. jfwiw.
it can be back needs adjusted,that wil do it too.

 

Are bleeders on top or bottom of caliper ?

 

Heh. Beat me to it. Betcha they are on the wrong side. You can bleed forever and not get the air out that way.

 

Listen to this unintelligent person at your peril, people.

 

Aw dang it I just noticed that the bleeders are low, gonna swap them over and check again, I'll post up here. Hopefully I'm just an idiot, and that's the fix

 

You wouldn't be the first one of us to pull a bonehead stunt like that!

Don't ask me about the time I had my whole intake system torn apart on my roadster when my non-mechanical friend asked, "Are you sure you have gas in it?"

Uh.....

I didn't know whether to kill him or me!

 

Thanks a lot guys, the right and left calipers got switched somehow. They didn't come with instructions, so I got em on wrong. Well, now I have an extra master cylinder. I'll probably put it in a box somewhere on a shelf just in case. Brakes work like a dream now.


Thanks!

 

Thanks for letting us know.