49 --- Brakes drag - disc brakes
Disc warped. The disc must be renewed.
Caliper piston, caliper or pads corroded. The brake caliper assembly is vulnerable to corrosion due to water and dirt, and unless cleaned at regular intervals and lubricated in the recommended manner, will become sticky in operation.
Piston seal deteriorated. The seal is designed to return the piston in the caliper to the retracted position when the brake is released. Wear or old age can affect this function. The caliper should be overhauled if this occurs.
Brake pad damaged. Pad material separating from the backing plate due to wear -or faulty manufacture. Renew the pads. Faulty installation of a pad also will cause dragging.
Wheel spindle bent. The spindle may be straightened if no structural damage has occurred.
Brake lever or pedal not returning. Check that the lever or pedal works smoothly throughout its operating range and does not snag on any adjacent cycle parts. Lubricate the pivot if necessary.
Twisted caliper support bracket. This is likely to occur only after impact in an accident. Renew the caliper assembly.
© April 2014