I have a rhd 1993 Jeep Cherokee. We put new pads on then after a few days the right front brake locked up. We then put a new calibur on that side and drove it for about a mile and both front brakes locked up. Then we put a new master cylinder on drove for a couple a miles and they locked up, we then put a module on and again the front brakes locked up. What else is there to do, back is fine front isnt. Please help
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Re: front brakes locking up
Sounds like the front brake hoses went bad on you. Fluid goes into the calipers and builds up pressure, and applies the brakes, because the fluid can't come back out of the calipers. Usually when hoses go, they tear on the inside, creating a one way valve type of flap. I hope that this helped. Best wishes to ya.
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You got shutter ......do you mean shudder when braking and if so the problem with your brakes are that the pads dont work well with the rotors (dont care what the makers say) just see if you can get your self a set of PRIME disc pads and fit them to the front and make sure that the whole unit are bolted on tight and no movement in wheel bearings....
It also sounds like a more likely problem is a seized caliper on the left side. If a caliper seizes, the braking system transfers the pedal pressure to the other caliper thus, the working caliper locks up. Pull both front wheels and look carefully at the wear on the pads. Both wheels should have the same amount of wear. If one side is worn more than the other, the side with the least wear is seized and needs to be changed.
Never heard of a hydraulic repostioning valve, but maybe with ABS there is one. I do know of a proportioning valve which apportions brake pressure front to back and also blocks braking to front or back in the event of brake line failure. Maybe see which he is talking about, should be able to explain the difference. Hope this helps.
Something doesn't sound right, you shouldn't have to remove the brake line to install pads. Did you have to do this on both sides? Do the new pads and the old pads look the same? Did you get the caliper on crooked? Just recheck your work first before replacing more parts. When you install the caliper, You have to hook the pad on one side first before you slide it over the rotor.
Put new calipers on both sides, my wife has a 2001 durango, 2 years ago i had to put new ones on because of the same problem you are having and it fixed it, acording to everyone i talked to, has had the same problem with calipers on chys. products especialy Dakodas and Durangos with my wifes the right front wheel locked up but when it cooled down it would work again.
You say they replaced basicly everything that involes the rear brakes.
Every step they took to find the problem could lead to the solution,BUT
did they check the inboard brakes. The brake system on a jeep that has
rear rotors have inboard shoes for the parking brake.
You could have a parking brake cable that is frozen (this will cause a
drag on the inboard brakes. Do you use the parking brake? Maybe the
parking brake shoes are adjusted too tight?
todays sports utility vehicles are equiped with a proportioning valve. they are usualy located at the rear of the vehicle. this valve regulates the flow of brake fluid to the calipers. most suv`s have a ride control arm on them that is linked to the rear suspension to apply more braking force to the rear wheels in a harsh or sudden stop. if this valve is bad or malfunctioning even body roll can redirect brake fluid to the rear wheels causing them to lock up., hope this info helps