Help! Brake piston problem

[HKP]

Needs some urgent advice.
Taken rear wheel off and cleaned bike. Rear brake got pressed during cleaning and the pistons have closed the pads together. Managed to push back the right had side piston, but the left won't move. Don't know what to do to get it back so I can put the rear wheel back on again.
Please help I feel like a right **** now.

[timwilky]

I found that I am able to use a piece of bar accross the piston and a G clamp to push pistons back in.

Examine it carefully to find out what the obstruction may be. Normally it is the dust seal being dragged out on crud so time to fit new seals.

[HKP]

No obstructions that I can see. Tried with the G clamp, not moving.
Anymore tips?

[weegaz22]

i used adjustable grips to squeeze the pistons back in, if you cant get it back in then you may need to take the caliper off and strip it and put new seals in

[HKP]

Oh no. Things got better then worse.
Managed to get the pistons back and wheel on.
Now I have no rear brake when I press the pedal and a small fluid leak.
Thinks I am going to the garage to get some professional help tomorrow now..

[Warren]

Oh no. Things got better then worse.
Managed to get the pistons back and wheel on.
Now I have no rear brake when I press the pedal and a small fluid leak.
Thinks I am going to the garage to get some professional help tomorrow now..

take it the leak is coming from the brake calipar itself, sounds like you pinched the seal,

shouldnt cost too much to fix.

regarding the brake not working, when you put it all back together, you did pump the lever several times didnt you ?

[HKP]

In the hands of the professionals now. Thanks for everyones help anyway.

[TSM]

what probably happened is when you started to push the piston back it got jammed at an angle and as you tried to sort it out the inner seal has either broken or as said has been pinched.

[HKP]

Ouch!!! £93 to fix my brakes.
Now thats a stinger.............................