Expansion Valve: Service and Repair

A/C UNIT ASSEMBLY


EXPANSION VALVE : Removal and Installation


CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large amount of refrigerant or lubricant is detected, never perform lubricant return operation. Perform Lubricant Return Operation

REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Recycle Refrigerant.
2. Remove cowl top and cowl top extension. Removal And Installation.




Black Arrow Indicates :Nut
White Arrow Indicates : Vehicle front

3. Remove mounting nut, and then move lower dash insulator aside.




Arrow Indicates : Vehicle front

4. Remove mounting bolt (A), and then disconnect low-pressure flexible hose (1) and high-pressure pipe (2) from expansion valve.

CAUTION:
Cap or wrap the joint of the A/C piping and expansion valve with suitable material such as vinyl tape to avoid the entry of air.





5. Remove mounting bolts (A), and then remove expansion valve from evaporator.

INSTALLATION
Note the following items, and then install in the reverse order of removal.

CAUTION:
- Replace O-rings with new ones. Then apply compressor oil to them when installing.
- Check for leakages when recharging refrigerant. Leak Test.