sticking front caliper

[matt]

do you rebuild or buy rebuilt  i have rebuilt car calipers so i know i can do it but what is the sucsess rate. home rebuild versus bought also just seals or pistons to

[Valkpilot]

do you rebuild or buy rebuilt  i have rebuilt car calipers so i know i can do it but what is the sucsess rate. home rebuild versus bought also just seals or pistons to

You've probably just got dirt and brake dust residue (in techincal terms, mung) built up on the caliper pistons.

Remove the calipers, take out the brake pads, and use compressed air blown into the brake-line hole to push out the pistons.  I like to put a piece of flat wood like a paint stirrer against the caliper frame opposite the pistons, to keep one from coming all the way out before the other one is pushed out.

Clean out the inside the caliper, then use brake parts cleaner and a brass brush to remove the mung and make the pistons shiny again.  Reassemble, bleed, and you should be good to go.

[hubcapsc]

They're easy to rebuild. Get the seals, number 1 in this picture:



Take your caliper(s) off...

Your pistons will probably have to be blown out with compressed air, put your air nozzle where #7 goes, and protect your eyes from
brake fluid that might spew out...

Clean everything up like new.

I jamb a piece of one-by in front of the pistons to keep them from shooting out like missles... actually, in this picture there's
two one-bys... push out the pistons a little, take out a one-by... push them out a little more... the idea is to avoid "coming out
explosively  "...



You will probably be successful, though I tossed this caliper (and got another fine one to rebuild from Pinwall for $30) when I finally got
it's pistons out:



-Mike