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Old 12-09-2010, 05:31 PM   #1
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Talking Over heated calipers and pads

If you see tan colored powder around the caliper piston, it is residue of breakdown of the bakelite piston.
Had a sticking brake on drivers side but both rear wheel calipers had heat damage, including the external rubber seals.
May have been caused by the open grease system, standard to use silicone grease on the sliding mechanism open to the weather, found rust on the seldom used surfaces.
Also the brake pads and rotors had etching and pad material due to the lack of use and over heating.
The mechanic that recommends a monthly trip to excercise everything has a good point, but somehow I will have to keep the pads and rotors dry in storage, maybe take it out on a dry day use the brakes a few times and then make sure they are covered in storage.
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Old 12-23-2010, 07:21 PM   #2
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Replaced both rear pads and calipers, on researching job I found Workhorse is now recommending flushing brake fluid every two years. Emptied reservoir, using a mirror I could see clumps of crud, scraped it clean an refilled with fluid, tried to make it a one person job, bought a vacuum pump from HF, turns out only the old way works, get copilot to do the brake and signal with taps to frame. Two quarts of fluid to have clear new fluid with no bubbles.
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Old 12-23-2010, 10:26 PM   #3
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The new fluid will dissolve a lot of the crud out and get contaminated fairly quickly since it managed to get into this state. You may want to do your next brake flush early, then you should be ok.
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