Expansion Valve: Service and Repair
THERMAL EXPANSION VALVE REPLACEMENTTOOLS REQUIRED
J 39400-A Halogen Leak Detector
REMOVAL PROCEDURE
1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.
2. Remove the evaporator tube to TXV nut (1).
3. Disconnect the evaporator outlet and inlet tube from the TXV.
4. Remove and discard the sealing washers.
IMPORTANT: Cap or tape the open evaporator inlet and outlet tubes immediately to prevent contamination of the refrigerant system.
5. Cap off the evaporator inlet and outlet tube.
6. Remove the TXV to evaporator bolts.
7. Remove the TXV from the evaporator core.
8. Remove and discard the sealing washers.
INSTALLATION PROCEDURE
1. Install the new sealing washers onto the evaporator core.
2. Install the TXV to the evaporator core.
NOTE: Refer to Fastener Notice in Service Precautions.
3. Install the TXV to evaporator bolts.
Tighten
Tighten the bolts to 7 N.m (62 lb in).
4. Remove the cap or tape from the evaporator inlet and outlet tubes.
5. Install the new sealing washers onto the evaporator inlet and outlet tubes.
6. Install the evaporator outlet and inlet tube to the TXV.
7. Install the evaporator tube nut (1).
Tighten
Tighten the nut to 27 N.m (20 lb ft).
8. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
9. Leak test the fittings of the component using J 39400-A.