sorry, another brake disc problem. help needed!
Discussion
Hi guys.
Went round the 'dog last night and my front brake disc was binding. A bit of investigation shows that there is plently of life left in the pads and the pistons seem to be moving. The brake feel is definatley sharper with less lever travel. The brake is an 07 juicy five unit and has done about 300 miles.
It has been suggested that there might be a bit of grit between the piston and the cylinder, stopping the piston from retracting. The said cure for this problem was to take it the my LBS were they have to 'blow' the piston out and clean it. If this is the case, is it not possible to fix it myself, as i'm planning on doing the 'marin trail' at the wk/end and havn't got time to drop it off at a shop.
all the best.
Rpm
Went round the 'dog last night and my front brake disc was binding. A bit of investigation shows that there is plently of life left in the pads and the pistons seem to be moving. The brake feel is definatley sharper with less lever travel. The brake is an 07 juicy five unit and has done about 300 miles.
It has been suggested that there might be a bit of grit between the piston and the cylinder, stopping the piston from retracting. The said cure for this problem was to take it the my LBS were they have to 'blow' the piston out and clean it. If this is the case, is it not possible to fix it myself, as i'm planning on doing the 'marin trail' at the wk/end and havn't got time to drop it off at a shop.
all the best.
Rpm
Is it all lined up correctly? Does sound like a slilghty sticky piston. You need to make sure the pistons are centred over the disc (note PISTONS not pad.. Unevenly worn pads centred overed the disc means the pistons are not central).
Take the caliper off, take the pads out, and give it a good clean, an airline would be useful. Bolt it all back up, centre the pistons over the disc, and check that they are both moving equally. A combination of resetting the pistons using a ring spanner, and jamming the brake on, should get them centred properly. A bit of brake fluid dribbled round the pistons can help to alleviate any stickiness (obviously, with caliper miles away from the pads and disc.)
Take the caliper off, take the pads out, and give it a good clean, an airline would be useful. Bolt it all back up, centre the pistons over the disc, and check that they are both moving equally. A combination of resetting the pistons using a ring spanner, and jamming the brake on, should get them centred properly. A bit of brake fluid dribbled round the pistons can help to alleviate any stickiness (obviously, with caliper miles away from the pads and disc.)
snotrag said:
Is it all lined up correctly? Does sound like a slilghty sticky piston. You need to make sure the pistons are centred over the disc (note PISTONS not pad.. Unevenly worn pads centred overed the disc means the pistons are not central).
Take the caliper off, take the pads out, and give it a good clean, an airline would be useful. Bolt it all back up, centre the pistons over the disc, and check that they are both moving equally. A combination of resetting the pistons using a ring spanner, and jamming the brake on, should get them centred properly. A bit of brake fluid dribbled round the pistons can help to alleviate any stickiness (obviously, with caliper miles away from the pads and disc.)
Take the caliper off, take the pads out, and give it a good clean, an airline would be useful. Bolt it all back up, centre the pistons over the disc, and check that they are both moving equally. A combination of resetting the pistons using a ring spanner, and jamming the brake on, should get them centred properly. A bit of brake fluid dribbled round the pistons can help to alleviate any stickiness (obviously, with caliper miles away from the pads and disc.)
thanks for the reply,
pretty sure that one calliper moves more than the other but will have a mess tonight. how do you reset the pistons?
Gassing Station | Pedal Powered | Top of Page | What's New | My Stuff