Air disc brake adjuster

An adjuster (34) for an air disc brake assembly is used to drive tappet members (40,42,48) on opposing sides of a rotating brake disc (14) to adjust brake pad position in response to pad wear. The adjuster includes a one-way clutch (64) that permits the tappet members to be driven for adjustment in a brake apply direction and prevents adjustment in a brake release direction. The adjuster includes an adjuster input shaft (52), which is actuated by a brake operating shaft (44), and an adjuster body (56) that supports first and second adjuster members. The one-way clutch couples the adjuster input shaft to the adjuster body such that the first adjuster member (60) drives a first tappet assembly (40) to adjust a first brake pad (26) on one side of the rotating brake disc, and the second adjuster member (62) drives a second tappet assembly (48) to independently adjust a second brake pad (28) on an opposite side of the rotating brake disc.