NOTE: If the antilock control assembly needs to be replaced, the rear axle type and tire revolutions per mile must be programed into the new CAB. For axle type refer to Group 3 Differential and Driveline. For tire revolutions per mile refer to Group 22 Tire and Wheels. To program the CAB refer to the Chassis Diagnostic Manual.
Fig. 7 Controller Mounting Screws
1 - CAB
2 - MOUNTING LOCATIONS
REMOVAL
(1) Disconnect battery negative cable.
(2) Remove the brake lines from HCU (Fig. 8).
(3) Push the harness connector locks to release the locks, (Fig. 5) then remove the connectors from the CAB.
(4) Remove the nuts which attaches the assembly to the mounting bracket (Fig. 9).
(5) Remove the assembly from the vehicle.
Fig. 8 HCU Brake Lines
1 - CAB
2 - BRAKE LINES
3 - HCU
Fig. 9 Mounting Bracket
1 - ANTILOCK CONTROL ASSEMBLY
2 - MOUNTING BRACKET
INSTALLATION
(1) Install the antilock assembly into the bracket and tighten bolts to 14-15 N*m (10-12 ft. lbs.).
(2) Connect the CAB harnesses.
(3) Connect the brake lines to the HCU. Tighten brake line fittings to 19 N*m (170 in. lbs.).
(4) Connect battery.
(5) Bleed brake system.