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piston stuck in caliper

  • wireman
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19 Feb 2006 13:52 #24934 by wireman
piston stuck in caliper was created by wireman
ive got a rear disc brake caliper with stuck pistons,tried blowing out with air like i normally due but they are stuck!any ideas?:whistle:

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19 Feb 2006 14:34 #24948 by steell
Replied by steell on topic piston stuck in caliper
Have you tried hooking it back up to the brake line and using brake line pressure to pop it out?

I think you will get a lot more presure that way.

KD9JUR

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  • wireman
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19 Feb 2006 14:42 #24952 by wireman
Replied by wireman on topic piston stuck in caliper
this one hasnt been on a bike in a long time,i wonder if there is something i can soak it in that wont destroy the aluminum housing?i am going to powder coat the housing and replace the piston and seals if i can get it apart otherwise i guess i can dig up another caliper.does anyone know of a caliper off a newer bike that can be used with stock 1000 hub and rotor and be mounted on bottem side of swingarm without a major amount of hassle?

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19 Feb 2006 14:48 #24954 by steell
Replied by steell on topic piston stuck in caliper
If you can get the boot and seal off, maybe soaking it with PBBlaster (penetrating fluid) would help. Might have to let it soak for a day. Maybe even heat the caliper?

KD9JUR

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  • Duck
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  • e vica na i sau na ga
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19 Feb 2006 15:53 #24968 by Duck
Replied by Duck on topic piston stuck in caliper
Is this that lovely triangle shaped caliper with a circle and wings
at the wide end? PITA! Suggest filling the cylinder with MMO
(Marvel Mystery Oil) or ATF. Then set the thing piston down in a small
basin with enough ATF to come as high as the inner seal. Give it a try
with hydraulics after a day of soaking. If it's not all the way in the cylinder
it will help to alternately push it in a bit and work it out a bit.

-Duck

Post edited by: Duck, at: 2006/02/19 18:55

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19 Feb 2006 16:30 #24980 by arobsum
Replied by arobsum on topic piston stuck in caliper
i soaked mine in some carb cleaner for awhile to soften the rubber up..when i hit it with the air it popped right out. of course it takes paint off too.

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20 Feb 2006 05:25 #25071 by waterman
Replied by waterman on topic piston stuck in caliper
I had to go the PBBlaster route last year and it worked. Since I already had decided that the piston was toast, I got a little rough working it back and forth until it came out.

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  • wireman
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20 Feb 2006 21:35 #25256 by wireman
Replied by wireman on topic piston stuck in caliper
got one side out today,ill let the other side soak till tomorrow and try it again.:whistle:

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  • Shoe48
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  • Live each day as it is your last
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21 Feb 2006 16:51 #25452 by Shoe48
Replied by Shoe48 on topic piston stuck in caliper
I made a plug with a grease zerk in it , Just screw it into where the brake line goes , Just hook it up to the grease gun, Pump away , one will move sooner than the other ,, use a C Clamp to hold it back a bit ,, Just keep loosening up the clamp as the piston comes out ,, Kinda messy after the pistons come out ,, BUT it does work well :) Maybe for that extra stuck pistons :lol:

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22 Feb 2006 04:22 #25546 by Snakebyte
Replied by Snakebyte on topic piston stuck in caliper
Nice ideer with the grease. I just use a air nozzle with a rubber end and place a rag between the piston and braket. Then just blow it out. Watch your fingers with this one. You may want to cover your ears too.:whistle:

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