4-15. SERVICE BRAKE ADJUSTMENT (CONT)
Press in on locking ring (5) and turn adjusting nut (6) on both slack adjusters (1 and 2) 1/4 turn clockwise. The
brake shoes are now just clear of brake drums.
Measure distance from bottom of brake chamber bracket (8) to top of straight headless pin (9) on clevis (10)
(dimension A). Document measurement.
Apply semitrailer parking brakes by pulling out on knob of brake release valve (para. 2-9).