I think either the master cylinder spring has gone or the master cylinder piston has got stuck in. I've managed to strip the thing down but can't get the piston out to have a look at the spring behind - can anyone help please?
Cheers
Put the cap/diaphragm back on, and use a spot of air pressure through the hose fitting(plastic airbed adaptor for track pump works well).Probably a good idea to stick it in a plastic bag to avoid messy incidents.
thanks coatesy, I'll give it a go and see what I can do
ok - so 7 Bar won't shift it, anyone got any other top tips for getting the thing out please?
Taking it as read that you've removed the circlip.I'd guess that you've got the wrong kind of fluid or spray lube in there, and it's swollen the seals.If it's holding against 7 Bar, the only ways I can think of are drilling and tapping the piston, fitting a bolt and trying to pull it out, or using hydraulic pressure by connecting the other lever to it.
I have a Giant MPH (C2 clone) rear lever you can have if you have no joy.
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Thanks coatesy - yes, circlip out, just can't get the piston and spring out despite much coaxing. Don't think I have the technical skill to start drilling and tapping so not sure what to do now really. If I can get hold of a new master cylinder body from somewhere I have the bits to rebuild it. I've dropped Hope an email to see what they suggest.
bedmaker - many thanks for the offer - I'll drop you an email this evening
Cheers
Simon
Feel free to send it to me and i'll have a crack with the hydraulic pressure thing if you'd like, no promises, but I should be able to get it moving.Either e-mail me, or send it FAO Coatesy to Sunset MTB, 119-121 Woodville Rd, cathays, Cardiff, CF244DZ.
stick the hole thing in a pot of boiling water it works sometimes.
thanks pete - in boiling water as we speak, I'll see what it does
coatesy if that doesn't work I'll stick it in the post to you if that's ok, many thanks for your help