Rear Brake Caliper

[indybobm]

I bought a used rear brake caliper from Pinwall. I wanted to rebuild it and put it on my bike this winter, then rebuild the one I take off as a spare. It is off of a 98 Tourer, same as mine. I cannot get the pistons out. They do not move or spin at all. I have tried air pressure (90psi) with no success.  I am not through riding for the year or I would hook it up to my rear master cylinder and us that to move them. Should I get another caliper and give up on this one?

[Tom McInerney]

I would think you could fill it with brake fluid ,hook up the brake line and push them out with hydraulic pressure.

[hubcapsc]

you might try letting liquid wrench have a go at the pistons, and then try again. Before
I had a decent compressor I used to take my calipers up to the man at the NAPA store,
and blow the pistons out with his giant compressor... I like the hydraulic pressure idea,
but I've never tried it, and can imagine me making a giant (paint eating) mess with it 

Good luck...

-Mike

[Ricky-D]

If you have a grease gun you can hook up the grease gun and push them out.

Just another hydraulic press.

Fill the caliper with oil to save the grease.

You can get a connector for the two at the hardware store.

***

[hubcapsc]

You can get a connector for the two at the hardware store.

If this works (sounds like it would), and it's that easy to make the
connection, this belongs in that "tricks of the trade" thread someone started...

-Mike

[eric in md]

   yep works good too.fill some with oil and then pump it with a grease gun until pistons push out..

[mirion]

Yes, be carefol with air to prevent the piston from coming out like a bullet when it lets loose, grease or oil is much safer.