amoeba Posted January 12, 2008 Report Share Posted January 12, 2008 Hi all, I posted the other day about my 04 magura lever sticking on piston retraction.. And still havn't been able to find a solution!Ive taken the lever body apart and thoroughly cleaned it. The piston and spring and chamber are all spotless and are in need of some sort of lube to get them sliding nicely.. Ive tried WD40 and oil.. but for some reason the piston (when reinserted) wont retract fully back up the chamber.. Infact it sometimes just goes in and gets stuck!I thought ok, maybe its got a blemish somewhere thats stopping it from moving freely, however all surfaces are perfectly smooth.Thinking that one may b faulty, i got an old one that i wasnt using any more and tried the exact same procedure on that one..SAME prob.. (note: these were previously working levers - no knocks/dents)Clearly buying a new lever would be the perfect solution, however this surely should be easily sorted..Does anyone have any suggestions as to what fluid/lube to use around the piston body and chamber (note: this is going to be and has been a water bleed for the last yr) ?Note: I have also tried leaving it as it is and bleeding it in the sink as per usual, however the lever being as it is wont move the water through the system properly and therefore fails.. Quote Link to comment Share on other sites More sharing options...
sidehop Posted January 12, 2008 Report Share Posted January 12, 2008 Take the bleed nut out and the tube out, Put a bleed kit in the bleed hole, Empty syringe and blast it back... Oil it up ( I used Tf2 bike oil from work ) when you are pushing air in meber to cover other hole with finger. Bleed it to the actuall brim so its packed with water....Mine worked mint ever since. Quote Link to comment Share on other sites More sharing options...
dave85 Posted January 12, 2008 Report Share Posted January 12, 2008 Hi all, I posted the other day about my 04 magura lever sticking on piston retraction.. And still havn't been able to find a solution!Ive taken the lever body apart and thoroughly cleaned it. The piston and spring and chamber are all spotless and are in need of some sort of lube to get them sliding nicely.. Ive tried WD40 and oil.. but for some reason the piston (when reinserted) wont retract fully back up the chamber.. Infact it sometimes just goes in and gets stuck!I thought ok, maybe its got a blemish somewhere thats stopping it from moving freely, however all surfaces are perfectly smooth.Thinking that one may b faulty, i got an old one that i wasnt using any more and tried the exact same procedure on that one..SAME prob.. (note: these were previously working levers - no knocks/dents)Clearly buying a new lever would be the perfect solution, however this surely should be easily sorted..Does anyone have any suggestions as to what fluid/lube to use around the piston body and chamber (note: this is going to be and has been a water bleed for the last yr) ?Note: I have also tried leaving it as it is and bleeding it in the sink as per usual, however the lever being as it is wont move the water through the system properly and therefore fails..The plastic of the piston doesn't like WD40, it swells it up. Reduce the diameter however you can, a lathe would be best if you can get use of one. Quote Link to comment Share on other sites More sharing options...
Fishy Posted January 12, 2008 Report Share Posted January 12, 2008 Bleed it through with mineral oil and use for a bit. That seemed to help mine. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted January 14, 2008 Report Share Posted January 14, 2008 I left mine in water and it seemed to do the job...no idea why it worked though...purely by accident Quote Link to comment Share on other sites More sharing options...
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