Restore Wars Rear brake caliper won't compress both cylinder

[Nightcorona]

I am restore 1984 Goldwing 1200 and one of the many issues is I cleaned rear caliper and the cylinders won't compress back in together. I can do one and the other pushes out. Is there a clog or do I just need to release the pressure? On cars I was always able to just push them back in with a C clamp.

 

[Dadster]

I think I was able to just catch both cylinders with a c clamp when I did my 84.

 

[dan filipi]

Fluid pressure from one piston will push the other piston out.
Put a old brake pad against the pistons then C clamp them both back in.

 

[joedrum]

hmmmmmm seems you have to have two clamps to keep from pushing to other out ...if there is a blockage this is also the only way to really power it open ...but should be hook up the line and fluid involved

 

[Dadster]

If you can only do one at a time, push one down and use a socket to hold it in place while you push the other down. Or do like Dan said. What ever gets the job done.

 

[Steve83]

When you push the pistons in, fluid is forced back into the master cylinder reservoir. You might need to remove some fluid from the reservoir if it's full.

 

[Nightcorona]

it only let me push it back when I did one at a time and then only when I opened the bleeder the resevoir is at the add level. It isn't running back.

 

[slabghost]

Okay. Get both pistons started with an old brake pad and a c clamp. Both calipers hooked up to the lines up to the master. Tighten the C clamp a bit at a time pushing the pistons into the calipers. Return hole is very tiny and likely plugged. Once it opens the C clamp will push the pistons in fully with some effort.