Help! novice Trying to fix brakes.... ;(
04-07-07, 06:05 AM
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Help! novice Trying to fix brakes.... ;(
hi,
i have a specialized rockhopper comp disc (think '03 or '04 model) with shimano m525 rear brake disc. the brake was making a squeeling noise so i decided to try and bleed it. amongst cleaning the rotor i decided to take the pads of clean them and undo the nipple and pump the brake (with pads out) and loads of oil came out. i then put the pads back in did up the nipple and put oil in and pumped the handle, NOTHING. the handle has no pressure and the pistons arent moving, there is oil in the caliper area but they are now sh****d!
any ideas on how to fix this?
thansk
i have a specialized rockhopper comp disc (think '03 or '04 model) with shimano m525 rear brake disc. the brake was making a squeeling noise so i decided to try and bleed it. amongst cleaning the rotor i decided to take the pads of clean them and undo the nipple and pump the brake (with pads out) and loads of oil came out. i then put the pads back in did up the nipple and put oil in and pumped the handle, NOTHING. the handle has no pressure and the pistons arent moving, there is oil in the caliper area but they are now sh****d!
any ideas on how to fix this?
thansk
04-07-07, 06:28 AM
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That's not how you bleed the brake.
1) open the nipple slightly
2) squeeze and hold the brake
3) close the nipple
4) release the brake
5) Repeat 1-4 several times until there are no more air bubbles coming out of the line, adding NEW FLUID (not re-used from the bleeding) to the resevoir as needed to keep it above the LOW level.
Also, I don't know if you should have the pads out when bleeding. When doing this on a car, you definitely want the brakes to be assembled with the pads in place and all that jazz.
Then, top off the resevoir to the high level, you should be good to go. Give it a few test stops in the safety of your driveway or on the sidewalk before you actually go out and ride.
1) open the nipple slightly
2) squeeze and hold the brake
3) close the nipple
4) release the brake
5) Repeat 1-4 several times until there are no more air bubbles coming out of the line, adding NEW FLUID (not re-used from the bleeding) to the resevoir as needed to keep it above the LOW level.
Also, I don't know if you should have the pads out when bleeding. When doing this on a car, you definitely want the brakes to be assembled with the pads in place and all that jazz.
Then, top off the resevoir to the high level, you should be good to go. Give it a few test stops in the safety of your driveway or on the sidewalk before you actually go out and ride.
