Dragging Disc Brakes

Mar 03, 2006 6 Replies
R

have an (new to me w/29k mi.) '02 Liberty on which the front brakes rotors seem VERY hot after long term run. The calipers are seemingly not unloading correctly.



Questions: ? Whats the best way to remove the friction in the disc brake system so that these can unload properly? .... removing the dust covers and applying a proper caliper grease? .... lubricating the piston seals? etc. ? Can the old caliper piston dust covers be reinstalled or does one normally destroy them when removing? ? What would the correct amount of piston 'preload' be so that there is 'enough' residual piston pressure to hold the brake pad 'close enough' to the rotor but NOT cause significant drag ..... dont want to get into brake vacuum booster preload - yet.



Advice appreciated. Thanks for your reply.



RichH


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M

Usually you want to lube up the pins that the caliper slides on as well as the slide bars it slides along with high temp brake grease. There should be a nylon sleeve in there.

The parts 'shouldn't' be throw away, so the dust cover should go back on easy enough.

If they both are doing it, then it might just be the nature of the pad material. Some drag is normal and most rotors get hot enough to burn your finger within a very few miles.

There is no preset on the piston, it re-sets every time you hit the brakes.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >
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C

Also, a small amount of hitemp break grease should be applies on the caliper where they meet both top and bottom. Your breaks should be checked and lubed on a yearly basis.

Coasty

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M

Bill:

Is there a 4-piston caliper that will bolt on to a TJ without any special modification?

Tom

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