Ever have a stuck brake caliper piston?

Wayne Meuir · Post by **Wayne Meuir** » Mon Feb 16, 2009 6:12 pm

This will usuall get it out safely:

Simply a bolt witht he same threads as you brake line banjo with a hole drilled all the way through. Head is then threaded 1/4 X 28 to fit an auto grease zerk. Screw it in the brake line hole and force the piston out with your grease gun.

Wayne

Post by **Suzsmokeyallan** » Mon Feb 16, 2009 6:39 pm

Wayne whatever happened to compressed air, most stuck pistons are pushed out somewhat already, and so a C clamp will push it back in to loosen it up, then you can use the compressed air or the grease treatment.
Nice tip though if the compressed air doesnt work on some really tight SOB.

Wayne Meuir · Post by **Wayne Meuir** » Mon Feb 16, 2009 7:10 pm

Compressed air did not work on my RZ, and they were not evn stuck very hard. In fact I have been riding the bike and they seemed to be working ok, but compressed air would not blow then out.

Wayne

Post by **Suzsmokeyallan** » Mon Feb 16, 2009 7:16 pm

What can i say,, its a Yamaha,,,,,LOL
Actually ive had some pretty ugly looking GT calipers that the load of congealed goo behind the piston came out with a bang, and i only used a rubber tiped airgun with about 70 psi.
Maybe i was lucky, so i'll need to try some old RZ calipers..

Coyote · Post by **Coyote** » Mon Feb 16, 2009 7:59 pm

I had a pair of GT calipers that at first attempt, air was useless. Then I took a rubber mallet and beat them all the way in. Installed the bleeders, covered everything with a rag, and blew into the feed hole. BANG! They came right out. I love doing that. It's such a satisfying POP!

Arne · Post by **Arne** » Mon Feb 16, 2009 8:23 pm

I always just push them out with the old brake fluid that's in the master cylinder.

H2RICK · Post by **H2RICK** » Mon Feb 23, 2009 4:49 pm

Well, Arne, that works IF there's any fluid left.....but there's lotsa times that evrything has evaporated AND blocked up the lines with crud......so even if you put fresh fluid in the master cylinder, it ain't going nowhere.
I've used the grease gun trick numerous times....especially when there's no air available. Messy.....but better than trying to track down and then pay for an especially rare caliper, IMO.