Stuck brake caliper Piston

[RegalSwan]

I was removing the brake caliper (front) on my '82 Maxim 650 to replace the brake pads when i noticed the piston wasn't moving at all. I tried to get it out every way i could think of deemed safe and the repair manual says it should just take a bit of compressed air. Can anyone help me get this out? Possible a chemical bath?

[kar_the_terrible]

nooo!! no chemical baths. just detach the caliper assembly from its mounting bracket with the brake lines still attached.

Open up the master cylinder cover and pump the brakes. The cylinder will slowly be pushed out, you must remember to slowly add brake fluid in the master cyl. as the caliper cylinder now fills up with fluid as the piston comes out.

If you have dual pistons, restrain the other one with a block of wood or something like that.

K

[RegalSwan]

So lucky me it looks as if my master cylinder is all sorts of messed up. The seal attached to the plunger was junk and there was a bit of rust and pitting....so long story short there is a new one on order and hopefully that will have enough power to remove the caliper piston.

[Skier]

So lucky me it looks as if my master cylinder is all sorts of messed up. The seal attached to the plunger was junk and there was a bit of rust and pitting....so long story short there is a new one on order and hopefully that will have enough power to remove the caliper piston.

You try my method linked to in your other thread in the General Maintenance forum?

[RegalSwan]

Skier-

Yes i did, thanks for the suggestion, it is exactly what the Haynes manual said and the pictures you included made sure i was doing what the manual recommended. My tire compressor just doesnt get the right seal with the "beach ball" nozzle attached, at least not a tight enoguh seal to allow me to push the piston out, i am hoping that this new master cylinder does the job, otherwise its to ebay for a part.