Hydraulic operated disc brake problem!

[kevspeed]

I have decided to use an old school hydraulic disc set up on my series 1with a 'hidden' master cylinder,it has been used before but using the motorcycle handlebar mounted master cylinder.
The problem im experiencing is that i cant seem to get the master to push out the slave piston.There is fluid getting through,and ive tried using a syringe to bleed from the slave end,and the conventional way,with a tube in a jar of fluid,any thoughts????

[rosscla]

How tight is the piston in the slave unit can you move it in and out by hand ?

[kevspeed]

Pretty tight,but its been used,so i wouldnt have thought its an issue!

[wack 63]

I'd strip it and check the seal and groove then pop the piston in without the seal to check it's free. The seal may have swelled

[kevspeed]

The thing is,there is no resistance at all at the lever,there is fluid getting through,but no pressure!
Everything is tight,so no leaks,so is there a way of testing the master?

[wack 63]

I've only done one on a Smallframe but I seem to remember it bled easy enough, I think I worked the piston lever by hand with the banjo bolt just undone a tad to pump the fluid out then tightened. The braided hose is a pain to bleed as once air is trapped it's hard to shift without pressure to force it out.