Auxiliary System Expansion Valve Replace

Expansion Valve

Removal

1. Remove first bench seat, if so equipped.
2. Remove auxiliary heater and/or air conditioner cover assembly (Fig. 6).
3. Discharge refrigerant system following recommended procedures. Observe all safety precautions.






4. Disconnect liquid line from expansion valve (Fig. 16). Use a backup wench to prevent entrance of dirt and moisture.
5. Remove insulating tape from evaporator core outlet tube. Then, remove clamp and expansion valve capillary bulb from outlet tube of evaporator core.
6. Using a backup wrench, remove expansion valve from evaporator core inlet tube. Cap inlet tube if it will be open to atmosphere more than 15 minutes.

Installation

1. Connect expansion valve to evaporator core inlet tube using a new 0-ring lubricated with clean refrigerant oil. Tighten connection only finger tight at this time.
2. Connect liquid line to expansion valve using a new 0-ring lubricated with clean refrigerant oil.
3. Using two wrenches, tighten liquid line to expansion valve fitting to 14-20 N.m (10-15 ft-lb). Tighten expansion valve to evaporator core fitting to 21-27 N.m (15-20 ft-lb).
4. Clamp expansion valve capillary tube bulb to evaporator core outlet tube Clean both surfaces. Bulb must make good contact with outlet tube.
5. Wrap evaporator core outlet tube and capillary tube bulb with insulating tape.
6. Leak-test, evacuate and charge refrigerant system following recommended procedures. Observe all safety precautions.






7. Install auxiliary heater and/or air conditioner cover assembly (Fig. 6).
8. Install first bench seat, if so equipped.