Expansion Valve: Service and Repair

THERMAL EXPANSION VALVE REPLACEMENT

REMOVAL PROCEDURE




1. Disconnect the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
3. Remove the liquid evaporator pipe connector block retaining nut at the cowl.




4. Remove the expansion valve connector block retaining bolts.
5. Remove the expansion valve.




6. Discard the O-rings.

INSTALLATION PROCEDURE




1. Clean the O-ring surface areas of dirt or contamination.
2. Install new O-rings on the evaporator tubes.
3. Install a new expansion valve onto the evaporator tubes.
4. Install the expansion valve retaining bolts.

Tighten the expansion valve retaining bolts to 12 N.m (106 lb in).

NOTE: Refer to Fastener Notice in Service Precautions.




5. Install the liquid evaporator pipe connecting block retaining nut at the cowl.

Tighten the liquid evaporator pipe connecting block retaining nut to 15 N.m (11 lb in).

6. Connect the negative battery cable.
7. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging.