Expansion Valve: Service and Repair

Thermal Expansion Valve Replacement - Auxiliary

Removal Procedure
1. Remove the evaporator core-auxiliary.
2. Remove the foam insulators (3) from the evaporator core-auxiliary lines.
3. Remove the foam insulators from the thermal expansion valve-auxiliary (4).
4. Using a back up wrench loosen the flare nuts from the thermal expansion valve-auxiliary.
5. Remove the auxiliary thermal expansion valve sensing bulb and retaining clip from the evaporator core-auxiliary lines.
6. Remove the thermal expansion valve-auxiliary from the evaporator core-auxiliary.

IMPORTANT: Cap or tape the open A/C refrigerant lines immediately.




7. Remove and discard the O-ring seals from the evaporator core-auxiliary. Cap or tape the lines to prevent contamination of the evaporator core-auxiliary.

Installation Procedure
1. Remove the cap or tape from the evaporator core-auxiliary lines.
2. Install the new O-ring.
3. Install the thermal expansion valve-auxiliary onto the evaporator core-auxiliary lines.

NOTE: Refer to Fastener Notice in Cautions and Notices.

4. Using a back up wrench, install the flare nuts from the evaporator core-auxiliary lines to the thermal expansion valve-auxiliary.

Tighten
Tighten the nuts to 5 Nm (44 lb in).

5. Install the foam insulators to the evaporator core-auxiliary lines (3).
6. Install the foam insulators to the thermal expansion valve-auxiliary (4).




7. Install the evaporator core-auxiliary.