Abstract: A caliper guide assembly for a heavy vehicle disc brake, the guide assembly comprising a guide pin, a guide bore arranged to receive the guide pin and permit relative axial sliding thereof, a bush arranged to define at least part of the guide bore, and a sensor arrangement configured to provide an output indicative of a state of wear of the bush. The sensor arrangement is configured to continuously detect a state of wear of the bush.

Abstract: A hydraulic disc brake for a vehicle. The disc brake comprises a service brake arrangement configured to actuate under hydraulic pressure to urge a brake pad towards a rotor to apply the disc brake during a braking operation; a parking brake arrangement configured to urge the brake pad towards the rotor to apply the disc brake during a parking operation, wherein the parking brake arrangement has an applied condition and a released condition; and a parking brake indicator configured to indicate whether the parking brake arrangement is in the applied condition or the released condition.

Abstract: A caliper guide assembly, a heavy vehicle disc brake having a caliper guide assembly, a sleeve for a caliper guide assembly, and a method of manufacture. The caliper guide assembly comprises a guide pin, a caliper, and a sleeve. The sleeve is configured to crease upon contraction of the sleeve along a longitudinal axis thereof.

Abstract: A method and apparatus for calculating the total running clearance of a disc brake. The method includes detecting axial movement of a component of a piston assembly of the disc brake to provide data indicating the displacement of the component of the piston assembly during a braking operation, and determining an amount of displacement of the component that occurs before inboard and outboard brake pads both contact a rotor to provide a calculated total running clearance.

Abstract: A brake assembly that includes a caliper that has a guide bore, a brake carrier, a guide pin having a guide sleeve, and a lock arrangement. The lock arrangement has a friction element and is operable to selectively apply a force to the friction element to increase friction between the guide sleeve and the guide bore and inhibit relative sliding between the caliper and the brake carrier.