Removal Procedure
- Drain air from the air tanks. Refer to 
Draining Reservoirs 
in Air Brakes.
 
- Tag and disconnect air lines from the control valve.
 
- Disconnect the electrical connector from the
control valve.
 
- Remove nuts, washers and control valve from the frame.
 
- Note the position of the elbow.
 
- Remove the elbow from the control valve.
 
Installation Procedure
- Install the elbow in the correct position.
 
- Install the control valve to the frame with the nuts and washers.
 
- Connect the electrical connector to the control valve.
 
- Connect the air lines to the control valve.
 
- Refill air back into the reservoir. Refer to 
Filling Reservoirs 
in Air Brakes.
 
- Inspect the system for leaks. Refer to
Air Brake System Testing 
in Air Brakes.