Expansion Valve: Service and Repair

Auxiliary Climate Control

REMOVAL
1. Remove the A/C evaporator core.







2. Separate the capillary bulb from the outer evaporator outlet tube.
1 Remove the A/C insulating tape.
2 Remove the clip securing the capillary bulb to the tube.

NOTE: Care must be taken not to damage the capillary bulb or tube.







3. Remove the A/C evaporator expansion valve.
1 Disconnect the refrigerant lines.
^ Disconnect the A/C liquid jumper line.
^ Disconnect the inlet line.

CAUTION: Use a wrench on each side of the fitting to prevent damage to the A/C fitting.

2 Remove the A/C evaporator expansion valve.

INSTALLATION







1. Install the A/C evaporator expansion valve.
1 Install new green O-ring seals.
^ Lubricate with clean PAG Refrigerant Compressor Oil (R-134a Systems) or equivalent.

NOTE: The green O-ring seals cannot be seen. They are located in the connections.

2 Install the A/C evaporator expansion valve.
3 Connect the refrigerant lines.
^ Connect the A/C liquid jumper line.
^ Connect the inlet line.







2. Fasten the capillary bulb to the evaporator outlet tube.
1 Secure the bulb to the tube with clips.
2 Cover the entire bulb and the tube with A/C insulating tape.

3. Install the A/C evaporator core.
4. Evacuate and charge the system.
5. Check the system for correct operation.