Brake bleeding issue

[jimmybeattie]

Hi
Changed all the discs, pads and fluid today and all went well up until bleeding the last calliper. When bleeding the drivers front calliper the inner nipple bled no problem but the outer one doesn’t want to know. The nipple isn’t stuck, I can undo it no problem but no matter how many presses of the brakes no fluid comes through.
Any ideas?
Thanks

 

[turkie172]

The bridging pipe might be damaged or the pistons are back so far that the fluid cant get behind them, It's an extremely simple system but were the old discs worn more on one side use a proper brake pipe spanner as the bridge pipe can be tough to undo the nuts are easily rung WD40 etc. a good time before trying to allow penetration. Looks like you need to strip the calliper to check put a strip of wood up the middle so the pistons cant just fall out and a bicycle pump is enough to push the pistons out enough to remove them if one drops out early the rest will not move. Make sure the reservoir bottle lid is open and enough fluid inside you might have air locked the system by causing a vacuum inside the bottle. With care the calliper can have the pistons removed wetted with brake fluid and put back in sometimes people replace the discs without checking why one side is more worn than the other.

 

[Foxspeed]

remove the nipple and make sure the end bleed hole hasnt rusted up...you can get them to rust from the top down if the rubber caps havent been fitted

 

[jimmybeattie]

Ok thanks for the advice. I’ll have a look when the rain stops

 

[jimmybeattie]

Turned out to be a rusted up hole through the bleed valve. New one on and issue sorted. Thanks again guys