Question about 1998 Jeep Cherokee

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I had my pads and discs replaced last week since then the pads don't seem to be releasing properly and are binding although the pistons seem to be moving freely .if the pistons had been forced back and fluid pushed the wrong way through the system would this cause the pressure to not release ?

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Pushing back the pistons is the only way to reinstall new pads and once the pressure is released on them, there is no force in any direction. More likely was perhaps poor preparation of the calipers; not removing the buildup of crud or a failure to use the special high temp. lubricant required by some systems. The lubricant is applied only to surfaces that shouldn't grip and if done well will not affect brake operation but only allows for smooth movement of the pads (and in single piston systems, the caliper itself) when pressure is applied by the pistons.
I would demonstrate the problem to the installers.

Posted on Aug 19, 2010

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Hi Jasa

Unless you are mechanically competent, I would not advise you carry out this procedure yourself, but leave it to the professionals.

If you are mechanically minded, and competent, the pads are relatively easy to replace, as follows.

Jack up the vehicle and put on stands, if you don´t have access to a hoist?

Remove wheels, and open the hood, put some kitchen roll around the brake fluid reservoir, to catch any excess brake fluid, when you push back the brake caliper pistons, if it´s been overfilled.
On the front brake caliper's, you are best to put in a little lever between pads and disc, and ease back the piston to fully retracted, unless you have a small G clamp which will do the same job when caliper is adrift.

Remove the 2 x 13mm caliper securing bolts and swing off the caliper, and support with a piece of wire, don´t just let it dangle on the brake hose.
Remove the brake pads, and sensor wire, check the caliper piston dust cover for splits, and clean caliper, housing, etc, and disc, with brake cleaner.

Fit the new brake pads to the caliper, and refit with 2 new securing bolts with blue lock tite, (normally supplied with the B/Pads.)

The rear caliper´s are pretty much the same as the front, although you can just undo the top bolt and swing the caliper back, but I usually remove both, for ease of cleaning, and inspection.

After rear caliper´s and pads and sensor wire, and new bolts are fitted, pump the brake pedal with the ignition on, and just run around, and check there are no leaks from the caliper pistons.
Check the fluid level, and lower with suction syringe if necessary.

By the way, 1. When did you last change your brake fluid ?
2. Adjust your front wheel bearings end float ?

You could do this now before you fit the wheels.?

Let me know if you wish the details for that too ?

Good luck !

Don´t forget to give me a FixYa rating please !

John.





Then refit wheels, drop down the car,

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