Procedures

Expansion Valve

Replacing the expansion valve

WARNING: Follow the appropriate safety precautions when working on the climate control system.

NOTE:
- Read the instructions about slow and large leaks.
- Always use new 0-rings lubricated with air conditioning (A/C) compressor oil.
- Always plug pipes and connectors when working on the climate control system.

Removal







- Remove the evaporator according to Evaporator.
- Disconnect the connections from the expansion valve, Use two wrenches.
- Remove the insulation.
- Remove the temperature sensor from the pipe (clip).
- Remove the expansion valve.

Installation







- Assemble the O-rings. Lubricate them with air conditioning (A/C) compressor oil.
- Secure the expansion valve by hand. Position it so that it is free of the evaporator. Secure it. Use two wrenches.
- Press the temperature sensor onto the pipe.
- Reinstall the insulation.
- Install the evaporator according to Evaporator.

- Tightening torque: Heavy duty pipe: 20 Nm, Thin pipe: 15 Nm, Sensor: 12 Nm.

Filling with refrigerant

- Vacuum pump according to Vacuum pumping.
- Fill the system with refrigerant according to Filling with refrigerant.
- Fill the system with fluorescent tracing agent according to Filling with fluorescent tracing agent.
- Leak trace according to Leak tracing electronic leak tracer or Leak tracing with fluorescent tracing agent and an UV lamp.