Mateo Posted May 14, 2020 Share Posted May 14, 2020 (edited) Hi there! I have quad qhd-sp hydraulic brakes (old stuff) and decided to replace the fluid at same time and doing my rotors and pads. Unfortunately, after bleed these are still soft with lots of leaver travel. As this model comes with dodgy access to master cylinder bleed port I tried using the "burp" technique where pressing leaver while reservoir is open. I pump and pump forever but air bubbles never seem to stop, after 15-20min leaver is about half way but brakes are far from solid. I suspect I have small leak somewhere, but how likely would that really be on both front and rear?! What's your advice, should I bleed them again? If so, use the open reservoir or syringe at both ends technique (kit I have seems to introduce new air if I try to pressurise syringe)? When you did it, it seemed as no air was left in the system but I spent hours trying to get mine back to decent order! Should I even bother wasting more time or get new Shimano set instead? Thx, Matt Edited May 14, 2020 by Mateo Quote Link to comment Share on other sites More sharing options...
ridemybike Posted February 8, 2021 Share Posted February 8, 2021 Hi there, Did you ever find a solution to your problem? I am having the same issue with my brakes. Cheers, Daniel Quote Link to comment Share on other sites More sharing options...
Administrators SickBiker Posted February 13, 2021 Administrators Share Posted February 13, 2021 It isn't very likely, that just by working the brake lever you would have pulled so much air into the leaky system. Try the procedure below + tap the hoses well: https://epicbleedsolutions.com/blogs/guides/how-to-bleed-quad-disc-brakes Quote Link to comment Share on other sites More sharing options...
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