HCU (Hydraulic Control Unit): Removal

Install prop rod on the brake pedal to keep pressure on the brake system.
Remove negative battery cable from the battery.
Pull up on the CAB harness connector release and remove connector.

Fig 1: Disconnecting CAB Harness Connector
Courtesy of DAIMLERCHRYSLER CORP.
Remove brake lines from the HCU.
Remove HCU/CAB mounting nuts and bolt (Fig. 4) and remove HCU/CAB.

Fig 2: Removing & Installing HCU/CAB
Courtesy of DAIMLERCHRYSLER CORP.