December 7, 201411 yr My front brake pads rub slightly on the disc. Is this normal or should it be 100% clear? I spin the wheel with it raised off the ground and there is definitely some friction.
December 8, 201411 yr All disc brakes run Zero clearance, always contact but there should be very little friction
December 8, 201411 yr The pads should retract slightly from the disc when the lever is released, the slave cylinder seals and seal grooves are profiled / designed to give a specific amount of retraction. Worn or ageing seals or build up of corrosion in the seal grooves or on the piston are common causes of insufficient retraction and pads rubbing on disc.
December 9, 201411 yr Author It's not normal, do you have any freeplay at the lever? Yes I do have freeplay there.
December 9, 201411 yr Author If there is too much friction, how does one adjust the brake? I believe its AJP. Is the only adjustment at the lever?
December 10, 201411 yr There is no adjustment, typical of hydraulic brakes is that it's self adjusting for pad wear You could try pulling the caliper and pushing the Pistons back in to see if they are stuck in the caliper Bear in mind the fluid goes back to the master, it may overfill so don't use a clamp or you could blow up the reservoir Also make sure your wheel brgs are not the culprit, even a tight axle can cause drag
December 12, 201411 yr Author There is no adjustment, typical of hydraulic brakes is that it's self adjusting for pad wear You could try pulling the caliper and pushing the Pistons back in to see if they are stuck in the caliper Bear in mind the fluid goes back to the master, it may overfill so don't use a clamp or you could blow up the reservoir Also make sure your wheel brgs are not the culprit, even a tight axle can cause drag Ok good info TY
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