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Hydraulic disc brake piston problem
I am in the process of replacing the brake pads on my SRAM Red 22 HRD
brakes. I have replaced the front pads with no problem, but when I try to push in the pistons on the rear one they always return to (almost) the original gap. Pushing in a piston on one side causes the other to move back out, and vice-versa. I wondered if it was an overfilled system on the rear brake but have never had cause to bleed or otherwise tamper with the hydraulics. |
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#2
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Hydraulic disc brake piston problem
On Tuesday, August 6, 2019 at 8:35:07 AM UTC-7, Kevin Edwards wrote:
I am in the process of replacing the brake pads on my SRAM Red 22 HRD brakes. I have replaced the front pads with no problem, but when I try to push in the pistons on the rear one they always return to (almost) the original gap. Pushing in a piston on one side causes the other to move back out, and vice-versa. I wondered if it was an overfilled system on the rear brake but have never had cause to bleed or otherwise tamper with the hydraulics. It sounds like it is over-filled or you are not pushing hard enough on the pistons -- or the pistons have been extended beyond their seals and gotten stuck. I'll defer to the DOT fluid experts on whether it can expand over time, but I would just bleed the system and see whether that fixes it. -- Jay Beattie. |
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