Hydraulic Brake
How do adjust the brake pads on hydraulic disc brakes?

I have 2006 Hayes Nine XC disc brakes but I dont know how to adjust the brake pads to fit the caliper into the rotor. Help!

Your Hayes brakes are self adjusting, if someone has pulled the lever whilst there was nothing between the pads then they will have closed together (pumped out), don’t use a metal lever as this will damage the pads, hayes recommend in their manual that you wedge thin pieces of card or plastic between the pads to generate enough gap to pull the pads out (the pads will not close up again when you remove the card), then use a screwdriver to push the pistons back into their bores [being careful not to bend the pad mounting post].

Alternatively, if you simply mean that the pads don’t align correctly so as to fit the rotor between them, then the caliper’s bolt holes are oblong shape, simply loosen the bolts holding the caliper to the mount/adapter, the caliper should move freely side to side, then squeeze the lever (with the brake caliper in place over the rotor) and tighten the bolts whilst still squeezing the lever, this should align the caliper evenly but sometimes it don’t! In which case you’ll have to lign up the caliper by hand.

Hope this helps!

HYDRAULIC BRAKES: PRINCIPLES OF OPERATION, PART 1 (DRUM BRAKES)

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