12-09-12, 10:10 AM
Ok so maybe I spoke too soon!
I've been running the bike for the last two days fine. I come down to go to work this morning and the back brake is gripping the disc. Not completely but enough to mean I'm on the GD bus - the heat build up if I rode it with the brake half on would be huge!!
So annoyed as this was the original reason I did all the work on the brake - it kept gripping the disc at random times even though I didn't use it. When I release the banjo bolt a quarter turn, a v small amount of fluid comes out of the bolt and then wheel can then move freely again and it's not gripping - so it's not the pistons, seals etc etc as they are going back in fine once the fluid has somewhere to flow back to - its something to do with the fluid not coming back when the brake lever is released. However it seems to happen whether I use the brake lever or not...... This is a new master cylinder so I'm really at a loss what to do next.
Is this just an airlock and I need to re-bleed? or something more serious? Would anyone recommend replacing the lines just to be safe or is that a waste of $$ and time.
Thanks and apologies to those that thought this was over.....
I've been running the bike for the last two days fine. I come down to go to work this morning and the back brake is gripping the disc. Not completely but enough to mean I'm on the GD bus - the heat build up if I rode it with the brake half on would be huge!!
So annoyed as this was the original reason I did all the work on the brake - it kept gripping the disc at random times even though I didn't use it. When I release the banjo bolt a quarter turn, a v small amount of fluid comes out of the bolt and then wheel can then move freely again and it's not gripping - so it's not the pistons, seals etc etc as they are going back in fine once the fluid has somewhere to flow back to - its something to do with the fluid not coming back when the brake lever is released. However it seems to happen whether I use the brake lever or not...... This is a new master cylinder so I'm really at a loss what to do next.
Is this just an airlock and I need to re-bleed? or something more serious? Would anyone recommend replacing the lines just to be safe or is that a waste of $$ and time.
Thanks and apologies to those that thought this was over.....
See you on the A3...