Rhino8123
NAXJA Forum User
- Location
- Chattanooga, TN
I joined this forum, because I've been reading through it for a while and I feel there are some knowledgeable people who will be able to help with this problem.
My buddy bought an 89 model Cherokee, which was supposed to have Dana 44s under it front and rear, but that ain't the case. The problem we're fighting though, was the guy told him it needed a new brake booster and the brakes would work. We replaced the brake booster and master cylinder, replaced both rear wheel cylinders, bled all the brake lines starting with the right rear and moving up to the front left, but we still can't get any pressure in the brakes -- no brakes at all for that matter. Another thing that seemed odd to us was if we took the cap to the master cylinder off and hit the brake pedal it would shoot brake fluid up to the top of the hood. The guy said he swapped the front axle with a D44, but it looks to me like what he swapped it with was a newer model D30 to bypass the old vacuum D30 (forgive me if I'm wrong, I'm not extremely familiar with XJs).
So, a few things we think may be causing the problem but we're unsure on is that it looks like it doesn't have the right calipers on it because they're not completely seated on the pads, and there is a vacuum leak under the dash. Another issue is some sort of switch that looks like it's supposed to connect to the brake pedal and the vacuum hose is hanging down and we can't figure out what it's for. I'm going to include several pictures for hopes of getting the brakes fixed and hopefully finding out for sure that the front axle is actually a D30 from a new model XJ.
We also haven't messed with the proportioning valve yet, but we haven't ruled out that it could be bad or not functioning properly. We were wondering what other model XJs we could pull one off of and bolt right up.
Thanks in advance for any advice/help.
Here is the white switch that looks like it should be behind the brake pedal, along with the vacuum hose that's unhooked and leaking.
switch dangling under the dash:
This is a pic of the passenger side of the front axle showing there is no vacuum there:
Front axle which appears to be a D30:
Front knuckle on the driver side:
Brake booster vacuum line running into the intake:
Brake booster/master cylinder hooked up:
Driver side rotor/caliper:
This is the front driver side caliper (looks like the wrong caliper, because the piston isn't seating all the way):
Same shot just the whole caliper & setup
Rear axle which is obviously a D35 after looking that the picture:
My buddy bought an 89 model Cherokee, which was supposed to have Dana 44s under it front and rear, but that ain't the case. The problem we're fighting though, was the guy told him it needed a new brake booster and the brakes would work. We replaced the brake booster and master cylinder, replaced both rear wheel cylinders, bled all the brake lines starting with the right rear and moving up to the front left, but we still can't get any pressure in the brakes -- no brakes at all for that matter. Another thing that seemed odd to us was if we took the cap to the master cylinder off and hit the brake pedal it would shoot brake fluid up to the top of the hood. The guy said he swapped the front axle with a D44, but it looks to me like what he swapped it with was a newer model D30 to bypass the old vacuum D30 (forgive me if I'm wrong, I'm not extremely familiar with XJs).
So, a few things we think may be causing the problem but we're unsure on is that it looks like it doesn't have the right calipers on it because they're not completely seated on the pads, and there is a vacuum leak under the dash. Another issue is some sort of switch that looks like it's supposed to connect to the brake pedal and the vacuum hose is hanging down and we can't figure out what it's for. I'm going to include several pictures for hopes of getting the brakes fixed and hopefully finding out for sure that the front axle is actually a D30 from a new model XJ.
We also haven't messed with the proportioning valve yet, but we haven't ruled out that it could be bad or not functioning properly. We were wondering what other model XJs we could pull one off of and bolt right up.
Thanks in advance for any advice/help.
Here is the white switch that looks like it should be behind the brake pedal, along with the vacuum hose that's unhooked and leaking.
switch dangling under the dash:
This is a pic of the passenger side of the front axle showing there is no vacuum there:
Front axle which appears to be a D30:
Front knuckle on the driver side:
Brake booster vacuum line running into the intake:
Brake booster/master cylinder hooked up:
Driver side rotor/caliper:
This is the front driver side caliper (looks like the wrong caliper, because the piston isn't seating all the way):
Same shot just the whole caliper & setup
Rear axle which is obviously a D35 after looking that the picture:
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