How do you know if your O-rings are bad?

[biggun400]

My rear brake isn't working after I pulled it apart to get the caliper to slide all the way in. The pedal goes down fine and if I loosen the bleeder valve and hit the brake, fluid sqirts out so I know there's no air. What is wrong? I can't figure it out. Somebody help me please.

[bwamos]

Just because it squirts fluid doesnt mean theres still no air in the lines.

Break out a jug of brake fluid.. and hold the caliper up. Put your thumb on the bleeder valve. and keep squeezing the brake lever over and over and over and over. Make sure to keep your thumb on it.. you dont want it pulling air back in after you let go of the brake lever.

The pressure will force the fluid past your thumb... but your thumb will keep the air from sucking back in. Do it about 50 times.. and you should be bled.. lol.

Or.. rent a bleeder.. lol. ;) I do it the hard way.. I'm cheap.. lol.

[biggun400]

thanks for the info! I'll try that this weekend when i get a chance to work on it again.