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?
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....
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.
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.