[badabing]

My 91 XJ's brake pedal feels hard, like you are pushing on the ground. I changed the rear brakes,everything, and all the front was changed. I also blead everything.
I read some where to check the brake booster, now this is where I am feeling stupid...where is it at?? I know where it is normally, bolted to the master cylinder. On my XJ I dont see it there. It has abs And I traced lines , but I just don't know where it is.. So any help on both problems would be great.

 

[Kyle]

Well it could be a result of your breaks being changed, mine are pretty hard aswell.

 

[Belto]

the booster is right infront of you, is on the fire wall, to the driver side, begind the air box, you wont miss it..

 

[89xjgrey]

Some older XJ's with ABS didn't have a brake booster per say...just an ABS pump and accumulator. You might have air in your accumulator. So I just re-read and saw yours was a 91. There won't be a booster. Make sure that you can hear the ABS pump prime when you first start it up.

 

[_StationWagon_]

Some older XJ's with ABS didn't have a brake booster per say...just an ABS pump and accumulator. You might have air in your accumulator. So I just re-read and saw yours was a 91. There won't be a booster. Make sure that you can hear the ABS pump prime when you first start it up.

He should have one ... I've seen many '91's with boosters and my '92 has one. Since the OP has ABS the booster should look like this. It's on the right if you're standing facing the grill.

 

[89xjgrey]

I could be wrong...maybe they changed it since '89? If there is a booster...check the vacuum check valve...plastic piece off vacuum line to booster.

 

[Jabo]

I could be wrong...maybe they changed it since '89? If there is a booster...check the vacuum check valve...plastic piece off vacuum line to booster.

My 89 &96 both have boosters,Check you vac. line going to it .Might want to replace the check valve.

 

[badabing]

I dont have the brake booster behind the master cylinder. I knew what the booster is, just not seeing it on mine when I was trying to see if it was bad had me woundering.
I will check the accumulator and that..

I just read that my Jeep has the Bendix ABS system

 

[jonb8]

My friend had a xj that didn't have a booster at all. some weird system and his brakes were hard like yours. Never did fiquer it out, but he did a print out of the system and they showed about 10 places you had to bleed.

 

[BlueXJ]

Key word here is ABS that is a seperate type system from conventional braking systems.

 

[Belto]

take pics of that no booster part, thats interesting

 

[89xjgrey]

So then I was correct...you should not have a brake booster with a bendix system. With the jeep off (not running) pump the brake pedal like 50 times. Why...to relieve the pressure in the accumulator. Then start it up and see if that makes any differenct. Just a thought.

 

[badabing]

I found some stuff about this brake system..Bendix 9 ABS system. It looks like it was a problem, not sure if it is a recall but the part has a lifetime warrenty.
I will get a pic up soon
http://www.aa1car.com/library/abs_bendix9.htm
http://answers.yahoo.com/question/index?qid=20070522070317AAqtX1h