RonH Posted yesterday at 07:07 PM Report Share Posted yesterday at 07:07 PM (edited) Need advice. I was washing my bike on the lawn and the kickstand sunk in into the soil and tipped the bike over jamming the front brake caliper. The lever, afterwards, would not spring back. I took the caliper off and forced the pistons open but the lever still had not sprung back. I then took the master cylinder apart and freed the piston. I inspected all the parts and they had no damage whatsoever. Then I tried bleeding the brakes, both by reverse and from the reservoir, but I cannot get the system to take any fluid at all. The ports in the master cylinder are open and clean. The pistons in the caliper move freely. I’ve checked the cable and it is free of clogs also. I’ve tried six times and failed. Any advice is welcome and appreciated. Thanks in advance! Edited 20 hours ago by RonH Typo Quote Link to comment Share on other sites More sharing options...
Tr1AL Posted 21 hours ago Report Share Posted 21 hours ago @RonH Hello , have you checked that the hole in the Bleed valve is clear of debris and that it has not been deformed at the tip by over tightening . If everything else is fine then that could be your problem, also sometimes they need opening quite a few turns before they will allow fluid to flow well. Best wishes Alan. 1 Quote Link to comment Share on other sites More sharing options...
RonH Posted 21 hours ago Author Report Share Posted 21 hours ago Thanks Alan! Yes, the bleed valve is clear and undamaged. It leaks small drips of fluid when open but I’ll take it off and check again. Cheers! 1 Quote Link to comment Share on other sites More sharing options...
konrad Posted 9 hours ago Report Share Posted 9 hours ago The most likely cause of the lever not returning is an over-tightened lever pivot bolt. Maybe the tip-over exacerbated that? Or dirt is causing binding? Your disassembly introduced a lot of air into the system. I would try to "gravity bleed" it initially. Open the caliper bleed valve (put a hose onto the nipple and direct the fluid into a container so as not to make a mess) and wait. Keep an eye on the fluid in the master cylinder with the cover off. Refill as needed, before it goes empty. When you think all the air is out, try bleeding using your normal technique. 1 Quote Link to comment Share on other sites More sharing options...
RonH Posted 2 hours ago Author Report Share Posted 2 hours ago Konrad, thanks for all. The lever is moving freely and it’s all extremely clean so that’s not the problem but I’ll give the gravity bleed idea a go today. Hadn’t thought of that. Thanks! Quote Link to comment Share on other sites More sharing options...
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