Hey guys,
I have an older set of Hayes HFX-Mag brakes (the G1 caliper design). After time and time again of messing with this 1 brake, it's driving me nuts.
I changed my tires today, so I put the bike upside down. Well......when putting it back side up, the rear brake lever went to the bars, I pumped it, and eventually got a regular lever back. I thought there was air in the lines (so I bled the system) and got some out. Right now the bike is upside down to see how it acts in a day or 2 being that way.
The history on this rear brake is I at one point with 6" rotors either boiled the fluid or royally messed something up. I took a long decent, hit the breaks, and the lever got so hard I couldn't squeeze it. It was like it had been stuck in open mode. After letting things cool down everything seemed to be working fine. I then found that my pistons were damaged so I replaced them, along with new o-rings and a new transfer port o-ring. I bled the system with new DOT3 fluid, new pads etc.....and got some power back, but still didn't feel like it should. I have another set of Mag's on my DH bike that were brand new and feel totally different (as far as rear's go). I do have a spare set of Hayes levers/calipers/lines etc...so parts aren't a problem.
After riding outside after this last bleed it seemed like I had the power back I wanted. It's currently at a 8" rotor (because I thought it'd give me some more power) on a hard tail. I can now skid the tire (which I couldn't do before).
I'm just wondering.........if I bleed and bleed till no end and there still is air in the lines, and I know I am bleeding it right (per hayes instructions) are there any ideas or places to check to see where air would be entering the system? They've never been crashed on or anything, just that once where the fluid must have boiled. The line doesn't appear to have any leaks nor does the master cylinder or caliper so I'm stumped.
I have an older set of Hayes HFX-Mag brakes (the G1 caliper design). After time and time again of messing with this 1 brake, it's driving me nuts.
I changed my tires today, so I put the bike upside down. Well......when putting it back side up, the rear brake lever went to the bars, I pumped it, and eventually got a regular lever back. I thought there was air in the lines (so I bled the system) and got some out. Right now the bike is upside down to see how it acts in a day or 2 being that way.
The history on this rear brake is I at one point with 6" rotors either boiled the fluid or royally messed something up. I took a long decent, hit the breaks, and the lever got so hard I couldn't squeeze it. It was like it had been stuck in open mode. After letting things cool down everything seemed to be working fine. I then found that my pistons were damaged so I replaced them, along with new o-rings and a new transfer port o-ring. I bled the system with new DOT3 fluid, new pads etc.....and got some power back, but still didn't feel like it should. I have another set of Mag's on my DH bike that were brand new and feel totally different (as far as rear's go). I do have a spare set of Hayes levers/calipers/lines etc...so parts aren't a problem.
After riding outside after this last bleed it seemed like I had the power back I wanted. It's currently at a 8" rotor (because I thought it'd give me some more power) on a hard tail. I can now skid the tire (which I couldn't do before).
I'm just wondering.........if I bleed and bleed till no end and there still is air in the lines, and I know I am bleeding it right (per hayes instructions) are there any ideas or places to check to see where air would be entering the system? They've never been crashed on or anything, just that once where the fluid must have boiled. The line doesn't appear to have any leaks nor does the master cylinder or caliper so I'm stumped.
