Problem(s) and solution(s) during a
Caliper Rebuild:
1) Stuck hanger pin
2) Stuck caliper piston
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Stuck Hanger Pin
Suggestions by
Michael Martin:
... try using an electric heat gun to heat the caliper body up to try to get the pin loose. Apparently someone assembled it without using an anti-seize lubricant. I'm afraid you will have to replace the piston if you used pliers on it.
There are some tips on the rebuild process here:
http://home.insightbb.com/~mmartin36/Caliper.htm~~~
Comments from
John Oosterhuis:
Here's some pictures:http://rides.webshots.com/album/563221618wHTihQSorry, haven't gotten around to properly captioning them yet...
Here's some more:http://rides.webshots.com/album/553581859wzdfYd
http://rides.webshots.com/album/551173257ZoegDtBuy a new hanger pin, I replace mine every 35K or so. Put a vice grip on the shank of the stuck one to 'assist' its unsticking. Smiley
If the plier marks on the piston are on the last 1/8" or so, an area that probably won't have to slide by the outer dust seal (and certainly not the inner fluid seal) you may be OK.
Don't forget to get new copper washers for when you install the brake lines onto the replacement calipers. ~~~
Comments by
Ted Norris:
If you look at the bottom of the Allenâ,,¢ wrench you'll see that it's rounded, grind it flat, doing this really helps the wrench hold rather than tend to clime out of the bolt also don't be afraid to put some real heat on the alum. in that area, alum dissipates He so fast that there's little chance that you will damage anything, securely hold the caliper and when loosening the bolt give it a good snap and it will probe start to loosen.~~~
Comments by
WJ Bertrand:
I think a male hex key on a 3/8" drive would be a lot more rigid and may allow you to get that pin turning.~~~
Comments by
Tony Pepenella:
Male hex socket on impact hammer.
Use manual impact hammer - you can control the 'collision' better. ~~~