Removal Procedure
- Apply the parking brake.
 
- Block the wheels.
 
- Drain all the reservoirs. Refer to 
Air Brake Reservoir Draining
 .
 
- Remove the trailer air brake emergency coupling hose. Refer to 
Hose and Line Replacement - Trailer and Emergency
 .
 
- Remove the trailer air brake service brake coupling hose. Refer to 
Hose and Line Replacement - Trailer and Emergency
 .
 
- Remove the trailer air brake coupling hose bracket connectors and the nuts.
 
- Remove the trailer air brake coupling hose bracket bolts, washers and the bracket.
 
Installation Procedure
Notice: Refer to Fastener Notice in the Preface section.
- Install the trailer air brake coupling hose bracket, the washers, and the bracket bolts.
 
Tighten
|     •  | Tighten the trailer air brake coupling hose bracket bolts to 12 N·m (106 lb in). | 
 
|     •  | Tighten the trailer air brake coupling hose bracket lower connectors to 28 N·m (21 lb ft). | 
 
|     •  | Tighten the trailer air brake coupling hose bracket connector nuts to 12 N·m (106 lb in). | 
 
Install the trailer air brake service brake coupling hose.
- Install the trailer air brake emergency brake coupling hose.
 
- Start the engine. 
 
- Charge the system air pressure to the governor cut-out point.
 
- Check for leaks with a soap solution. Leakage is not permissible.
 
- Remove the wheel blocks.