Ok what do I do? front brake caliper pistons


5 replies to this topic
  • tammie

Posted February 07, 2007 - 07:00 PM

#1

Ok Ive got my front brake caliper off, I want to remove the piston, Ive tried and tried with the compressed air and they DO NOT budge one bit.......Im having a hard time getting a seal to get enough air pressure in there, how much air pressure do you need??? ive only got a small compressor but it dials up to 100psi.........i just don't see those things budging, it is a 1999 and im not sure the pistons have ever been removed?? what do you suggest?

  • DaveJ

Posted February 07, 2007 - 10:56 PM

#2

Ok Ive got my front brake caliper off, I want to remove the piston, Ive tried and tried with the compressed air and they DO NOT budge one bit.......Im having a hard time getting a seal to get enough air pressure in there, how much air pressure do you need??? ive only got a small compressor but it dials up to 100psi.........i just don't see those things budging, it is a 1999 and im not sure the pistons have ever been removed?? what do you suggest?


Re-connect to the master cylinder, bleed it, then pump the pucks out using the brake fluid. Try to keep them equal (walk them out) by locking one then the other if needed. Don't allow one to pop out with the other one remaining deep in the caliper. And never grab them with pliers or such since you can easily damage them.

The slightest amount of dirt in the wrong area can really cause some big problems so keep everything as clean as possible.

If this doesn't work, you may be able to freeze the pucks using a spray on freeze solution (most electronic stores have this in a can).

But the point here is that hydraulic pressure will produce much better results than pneumatic.

Good luck!

  • tammie

Posted February 08, 2007 - 05:17 AM

#3

doh ive got teh entire bike apart and thus don't have anything connected id already drained the fluid and and removed the line.......ugh...

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  • ZéPovinho

Posted February 08, 2007 - 06:03 PM

#4

try lubing it with wd40 and keep blowing . make sure you dont let any air "leak out"

  • Fastest1

Posted February 09, 2007 - 12:46 PM

#5

DONT get your fingers anywhere near the pucks if using air! It wont be pretty when they do come out. LOL

  • tammie

Posted February 09, 2007 - 08:20 PM

#6

ok thanx for the advice, im going to try again and try to get a better seal as im blowing the air in ive got a couple ideas maybe use a rubber washer to make a better seal while blowing the air in......

thanx





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