Emptied master cylinder, still need piston out, next steps

[eikkaj]

N00b here when it comes to brakes. I have a caliper that seems to misbehave after braking once or twice - piston gets jammed, have to wait until it slowly goes back in. I figured a rebuild would be a good idea after asking around and would be interesting. Long story short, master cylinder is empty and half the caliper is attached to the brake line, I was hoping to push the piston out this way so that I could start the rebuild and probably while I'm at it replace the lines, etc since I just got the bike. Now that the master cylinder is empty, I obviously have no pressure. I'm wondering what the recommended course of action is here- fill it back up, do I need to bleed the master cylinder before I can get pressure again?

Thank you for any advice!

 

[Mars]

N00b here when it comes to brakes. I have a caliper that seems to misbehave after braking once or twice - piston gets jammed, have to wait until it slowly goes back in. I figured a rebuild would be a good idea after asking around and would be interesting. Long story short, master cylinder is empty and half the caliper is attached to the brake line, I was hoping to push the piston out this way so that I could start the rebuild and probably while I'm at it replace the lines, etc since I just got the bike. Now that the master cylinder is empty, I obviously have no pressure. I'm wondering what the recommended course of action is here- fill it back up, do I need to bleed the master cylinder before I can get pressure again?

Thank you for any advice!

I got mine out with compressed air. Just be careful to keep it aimed at the floor and have something soft like a wadded up towel to catch it.

 

[dirtdigger]

If the piston is coming out with the force of the master cylinder then fill it up and pump it till it comes out.

 

[Chris in Dorset England]

Fit a grease nipple to the bleed port, pump the piston out with a grease gun. Lever action type gun is best.