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Old 08-04-2015, 04:43 PM   #57
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Ach, the ebay ones = phenolic pistons!
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Old 08-04-2015, 06:37 PM   #58
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Any Truck Parts Store should have the calipers, use the casting number on the calipers for the replacements. Brake fluid should be changed every two years, and on the floating calipers the pin sliders should be lubed every few years. That should prevent the calipers from dragging. The dragging can also be from rust build up on the rotors since the Alpine is not used very much.
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Old 08-05-2015, 12:01 AM   #59
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Thanks for the reply. While your advice includes some good general maintenance tips it does not address the issue resulting in the recall of the Bosch brake calipers with which the early Alpine Coaches were equipped. You may want to read through this thread. In it is considerable information about the hygroscopic tendency of the phenolic material used in the pistons of these Bosch calipers.
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Old 08-05-2015, 01:39 PM   #60
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Bosch ZOH T slide pin calipers

I had the original Bosch caliper problems and finally got the new calipers from Bosch and they solved my problem. I would like to clarify the problem that I was having. If I used my brakes too much like in very heavy stop and go traffic or making a steep mountain decent, they would get too hot. This would trigger the problem of the phenolic lining of the piston swelling which would lock up the brake. When this happened all I could do is pull over as soon as possible and let them cool. The problem was not the cause of the over heated brake but rather the result. Overheating of the brake could just be a result of over use of the brake. We all have to remember that we are trying to stop a house and it takes a lot of energy to do this.
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