dan_addison Posted April 1, 2008 Report Share Posted April 1, 2008 Right running hayes 9's on my coiler and last night on a ride they were rubbing quite bad. A mate told me how to fix it but i couldnt remeber what he said(opps) He said something about pushing the pistons out. Sort of stoped the rubbing but now i have next to no breaking power. Anyone shed any light how i can get them back working. ASAP PLEASE!By the way foregot to mention its front break thats causing problems if that helps Quote Link to comment Share on other sites More sharing options...
2sixstreet Posted April 1, 2008 Report Share Posted April 1, 2008 Right running hayes 9's on my coiler and last night on a ride they were rubbing quite bad. A mate told me how to fix it but i couldnt remeber what he said(opps) He said something about pushing the pistons out. Sort of stoped the rubbing but now i have next to no breaking power. Anyone shed any light how i can get them back working. ASAP PLEASE!By the way foregot to mention its front break thats causing problems if that helpsHave you tried loosening the caliper, applying the brake and then doing the caliper back up? This will hopefully find its natural centre assuming the 9's are dual piston brakes (note spelling). Quote Link to comment Share on other sites More sharing options...
dan_addison Posted April 1, 2008 Author Report Share Posted April 1, 2008 I think there only single piston, Only one seems to move when the breaks pulled? might be wrong though. Sorry it that was a little vauge Quote Link to comment Share on other sites More sharing options...
psycholist Posted April 1, 2008 Report Share Posted April 1, 2008 (edited) If it's a Hayes 9 it's a dual piston brake. If it's a Hayes Sole remove it and throw it in the bin now before it really starts to annoy you. First check that the disk runs in the centre of the brake caliper. No point going any further without adjusting it if the caliper is off to one side.If it's a Hayes 9 and you only see one piston moving then it's likely the seal on the other piston has got stiff. Remove the wheel and lever the brake pads back with a clean screwdriver (The wider the blade the better - any grease/oil on the screwdriver will contaminate the pads). On other brakes I'd say to remove the pads, but the Hayes pads mount onto a nail head in the centre of the pistons, which is very easy to break off and requires the piston to be replaced in order to fix it, so better to sacrifice your pads (Which experience far worse when you're using the brakes normally anyway, so they'll be fine). Once the pads are back as far as they'll go start pumping the lever while holding the piston that was moving correctly in place to force the other one to move. Run the piston out and back a few times, checking to see if both pistons move when the lever is pulled. Once they're both moving put everything back together and try it out. Hayes pistons tend to seize after a few years use, so if this is the problem getting the piston moving might take a bit of force - make sure you're not wedging the piston sideways as you push it back though.For Hayes Sole you can wind in the stationary brake pad to give the brake its bite back - this is done with an allen key in the back of the caliper accessed through the spokes. There's a grubscrew locking this bolt in position, so undo this before adjusting the stationary pad in. Setting it up so the moving pad flexes the disk a fraction if a mm before it hits the stationary pad is the way to go here. Once you pads wear about 1/3 you'll find there's no way to get the brake to bite well on the Soles however, so either keep feeding them pads you barely wear or replace with a brake that doesn't suck... Edited April 1, 2008 by psycholist Quote Link to comment Share on other sites More sharing options...
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