The Goose
11-08-02, 01:53 PM
I have trouble with disc rub on my front Hayes cable brakes,I`ve tried adjusting the cable but to no avail,realizing that only one side of the caliper moves.Has anyone got any ideas?
Mountain Biking - Cable disc rub
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Maelstrom
11-08-02, 02:06 PM
Yes, Get new disks :D (Sorry I hate hayes mechs)
Ok there is a possible fix. On the non actuated side of the disk brake there is a moveable piston. This piston moves via the turn dial on the inside of the caliper. Problem is I couldn't move it and ended up ripping the plastic off and using clamps to turn (turn right or left to move in and out) the steel dial under the plastic cap.
There is and will always be some rubbing. If the rubbing is minor, leave it. The more you mess with it the more the hayes brake starts to not work. :)
There is also a set of bolts hold the caliper horizontally in place. This moves the whole caliper from left to right. Check the manual for exactly which bolts to lossen to move the caliper. When you find a good spot lock them down. Also make sure the non-actuated side of the caliper is closest to the disk. This reduces rotor flex during braking which will reduce the chance of the roto becoming bent.
Hayes manuals suck but here is the one for the hayes mechs
http://www.hayesdiscbrake.com/manuals/45-15216AEnglish.pdf
Ok there is a possible fix. On the non actuated side of the disk brake there is a moveable piston. This piston moves via the turn dial on the inside of the caliper. Problem is I couldn't move it and ended up ripping the plastic off and using clamps to turn (turn right or left to move in and out) the steel dial under the plastic cap.
There is and will always be some rubbing. If the rubbing is minor, leave it. The more you mess with it the more the hayes brake starts to not work. :)
There is also a set of bolts hold the caliper horizontally in place. This moves the whole caliper from left to right. Check the manual for exactly which bolts to lossen to move the caliper. When you find a good spot lock them down. Also make sure the non-actuated side of the caliper is closest to the disk. This reduces rotor flex during braking which will reduce the chance of the roto becoming bent.
Hayes manuals suck but here is the one for the hayes mechs
http://www.hayesdiscbrake.com/manuals/45-15216AEnglish.pdf
a2psyklnut
11-14-02, 07:41 AM
I'm not sure of the specific model you have, but to properly align some disc calipers, do the following:
Depending on the caliper style and the mounting tabs on your frame try the following:
Loosen the bolts holding the caliper to the frame, not all the way off, just loose.
Squeeze the brake lever, so the caliper clamps down onto the rotor. Put a rubber band tightly around the lever to keep it pulled tight.
Tighten the bolts holding the caliper. If you've got the disc tabs (frame/fork mounts) where the caliper mounts vertically in relation to the tabs, you can use tiny (really thin) flat washers to fill the void between the caliper and frame tabs, then tighten down the bolts.
This centers the calipers in relation to the rotor, when you remove the rubber band, the calipers should now be centered and the rubbing should be eliminated.
Hope this helped!
L8R
Depending on the caliper style and the mounting tabs on your frame try the following:
Loosen the bolts holding the caliper to the frame, not all the way off, just loose.
Squeeze the brake lever, so the caliper clamps down onto the rotor. Put a rubber band tightly around the lever to keep it pulled tight.
Tighten the bolts holding the caliper. If you've got the disc tabs (frame/fork mounts) where the caliper mounts vertically in relation to the tabs, you can use tiny (really thin) flat washers to fill the void between the caliper and frame tabs, then tighten down the bolts.
This centers the calipers in relation to the rotor, when you remove the rubber band, the calipers should now be centered and the rubbing should be eliminated.
Hope this helped!
L8R