Originally Posted by Streamers
I am having the same noise problem with my 77 disc brakes. They have mentioned a rubber bushing on the clevis/guide pins but I haven't heard of those before. That could be my problem, I guess. I'll replace clevis/guide pins first but would like to know about the rubber bushings.
There are no rubber bushings in the original Airstream disc brake system.
See posts 12 and 17 above.
The noise happens when the brass bushings and clevis pins wear.
The only rubber parts in the calipers is the "O" ring around the piston and the rubber boot that keeps the dust from entering around the piston.
The parts are getting scarcer, but we still are the only company that has them.
Some owners send us the calipers for overhaul, which would take care of the bushings, "O" rings and dust "boot."
Should you have a problem with the "sync" valve portion of the actuator, those can be overhauled as well. Some owners have chosen to upgrade the "actuator assembly" by installing a new style made by Actibrake, that does not require a source of vacuum. It does require the addition of a couple of wires.
The original system did a very good job, when working correctly.
Obviously, new technology allows upgrading to some degree.