Expansion Block/Orifice Tube: Service and Repair

Air Conditioning Evaporator Thermal Expansion Valve Replacement

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
2. Remove the nut from the TXV mounting stud.




3. Remove the evaporator tube and the compressor suction hose from the TXV.
4. Remove and discard the seal washers.




5. Remove the TXV bolts.
6. Remove the TXV.
7. Remove and discard the seal washers.

Installation Procedure




1. Install new seal washers to the evaporator core fittings. Refer to Air Conditioning System Seal Replacement (Air Conditioning System Seal Replacement).
2. Install the TXV.

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the TXV bolts. Tighten the bolts to 7 Nm (62 lb in).




4. Install new sealing washers on the evaporator tube and the compressor suction hose fittings. Refer to Air Conditioning System Seal Replacement (Air Conditioning System Seal Replacement).
5. Install the evaporator tube and the compressor suction hose to the TXV.
6. Install the TXV nut. Tighten the nut to 20 Nm (15 lb ft).
7. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
8. Leak test the fittings using the J 39400-A .