Topic: Brake caliper - piston stuck

[Dimitri13]

I had to get my piston out today. I didn't have access to a grease gun or air compressor and I had already taken the caliper off the bike.

What I did have though, was a bicycle pump and a fitting to stick into the brake line threads. A couple of pumps later, the piston popped out.

[70CB750]

I baked the caliper - in alum foil - @500 for half an hour and it came right out. But only b/c I was lazy to set up the grease gun.

[grcamna2]

70CB750,
     How did the piston look ?

[70CB750]

Looking good, polished right up.

[AbbyRider]

Wow. Just used the compressed air method. Thought it was going so smooth because the piston was creeping out ever so slowly. Then BANG! Man that thing shot out of there like a small missile. My shop heater took the brunt of it, but I sure am glad I wasn't staring at it watching the exit progress.

[bollingball]

Wow. Just used the compressed air method. Thought it was going so smooth because the piston was creeping out ever so slowly. Then BANG! Man that thing shot out of there like a small missile. My shop heater took the brunt of it, but I sure am glad I wasn't staring at it watching the exit progress.

Didn't you read about wrapping it in a towel and being safe.

Ken

[70CB750]

I done another with the grease gun and thats the best way.  Easy and safe.

[AbbyRider]

Didn't you read about wrapping it in a towel and being safe.

Ken
[/quote]

Yeah - I did have it in a towel, but couldn't see if I was making any progress. Wasn't sure if it was actually going to work. So I took the towel off to see how it was doing, and then SURPRISE! Will be way more careful next time.

[Jay D.]

+1 for the compressed air method - had great success tonight thanks once again to the forum.

[CapeCafe]

I've been reading through this thread and need to remove a stuck piston from my brake caliber and the tools I have handy lead me to the grease gun method.  My questions is where to pump the grease.  One answer in this thread says to screw a 10mm grease nipple into the bleed screw.  It seems to make more sense to simply screw a grease nipple into the hole for the brake line and pump away like you would if the mstr cyl was pushing.  Which hole is best ?  I know thats a loaded question

[MCRider]

I've been reading through this thread and need to remove a stuck piston from my brake caliber and the tools I have handy lead me to the grease gun method.  My questions is where to pump the grease.  One answer in this thread says to screw a 10mm grease nipple into the bleed screw.  It seems to make more sense to simply screw a grease nipple into the hole for the brake line and pump away like you would if the mstr cyl was pushing.  Which hole is best ?  I know thats a loaded question

Doesn't matter which hole. Leave the bleeder in, use the other. Remove the fitting from the hose leaving a stubby male thread. Its not the same thread as the hole, but it will catch a thread or two. That's all you need. Grease gun is several thou PSI. Piston will move slowly with each pump, safely. No "pop" and shoot across the room.

[70CB750]

Either way works. I use the bleeder as nipple for grease gun - but you can move it to line hole and block the bleeder hole. Thread is the same.

[70CB750]

The thread is the same - I moved my brake lines to the back and bleeders to the front for the dual disc setup. The only difference is the pressed in seat under the bleeder.