Just cant stop - JeepForum.com
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post #1 of 20 Old 09-08-2013, 05:49 PM Thread Starter
SamanthaRae
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Just cant stop

My 89 MJ comanche is giving me the hardest time with stopping. I replaced 3 brake lines and the rear shoes and now I can't get any pedal. I've bled the brakes multiple times and it just isn't getting anywhere. If I'm rolling at a slow very slow speed the brakes work but not like they should. Any ideas?

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post #2 of 20 Old 09-08-2013, 06:04 PM
wgirvine
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I suggest a careful inspection of every part:
1. Jack Jeep and place on 4 jack stands. Spin the rear wheels by hand while a friend pushes on brake pedal. Do the rear brakes work?
2. Spin the front wheel by hand; do those brakes work? Remove the front wheels. Push on brake pedal again and make sure calipers are squeezing the brake pads. Rotor should be locked solid. Release brake pedal; rotor should turn with light hand pressure (there is always a slight drag on a disc brake.)
3. Make sure there are no leaks.
4. With all four wheels removed, bleed brakes.
5. Are you sure you got the new brake shoes (rear) back together correctly? It's tricky...

The road goes on forever, the party never ends....
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post #3 of 20 Old 09-08-2013, 06:18 PM Thread Starter
SamanthaRae
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As we were putting everything back together it all spun properly without pressing the brake pedal. I didn't do anything to the fronts and before I changed anything I had brakes so the fronts should be good. I inspected all the new parts and even most of the old ones and cannot find any leaks. And the rear brakes are put together correctly. I had a couple of my friends who are mechanics look at the brakes to make sure they were put together correctly.
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post #4 of 20 Old 09-08-2013, 06:27 PM
wgirvine
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So how does it feel when you are going 45mph and hit the brakes? Is the brake pedal high and firm? Or low and firm? Low and mushy???

The road goes on forever, the party never ends....
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post #5 of 20 Old 09-09-2013, 03:52 AM Thread Starter
SamanthaRae
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It doesn't stop when I'm going slow. I'm not gonna speed without brakes. But the pedal is low and mushy as soon as you turn the truck on.
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post #6 of 20 Old 09-09-2013, 06:01 AM
cruiser54
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Did you adjust the rear brake shoes when you were done?

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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post #7 of 20 Old 09-09-2013, 06:05 AM Thread Starter
SamanthaRae
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Yes I Did. Gonna try bleeding the master cylinder today. See how that goes. Running out of ideas.
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post #8 of 20 Old 09-09-2013, 06:07 AM
cruiser54
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See how that goes. Could be a coincidence that the master cylinder took a dive on you.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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post #9 of 20 Old 09-09-2013, 06:14 AM Thread Starter
SamanthaRae
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That's what I was thinking. I might be buying a new mc soon.
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post #10 of 20 Old 09-09-2013, 06:54 AM
cruiser54
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Quote:
Originally Posted by SamanthaRae View Post
That's what I was thinking. I might be buying a new mc soon.
Less than $50 new.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #11 of 20 Old 09-09-2013, 07:07 AM Thread Starter
SamanthaRae
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That's a lot better then I expected.
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post #12 of 20 Old 09-09-2013, 04:42 PM
wgirvine
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Quote:
Originally Posted by SamanthaRae View Post
...But the pedal is low and mushy as soon as you turn the truck on.
Sounds like you still have air in the lines. Could you describe exactly how you are bleeding the brakes?

The road goes on forever, the party never ends....
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post #13 of 20 Old 09-09-2013, 05:16 PM Thread Starter
SamanthaRae
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With the truck off, pump the pedal 3 or 4 times and hold it. Then someone else cracks the bleeder. Then tightens it. Repeat that until straight brake fluid is coming out with no air. Do that on each tire starting the farthest from the master cylinder.
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post #14 of 20 Old 09-09-2013, 08:59 PM
wgirvine
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Well... you're doing it right!

The road goes on forever, the party never ends....
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post #15 of 20 Old 09-10-2013, 04:00 AM Thread Starter
SamanthaRae
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I know. Lol. I've done brakes many times before. Just can't figure these ones out.
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