Expansion Valve: Service and Repair

Expansion Valve Replacement

1. Remove the evaporator core.
2. Remove the bolts (A) and expansion valve (B).






3. Install the expansion valve in the reverse order of removal, and note these items:
- If you're installing a new expansion valve, add (POE) refrigerant oil (SANDEN SE-10Y). Using the wrong refrigerant oil can be a safety hazard.
- Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.
- Immediately after using the oil, dispose of any remaining oil in the container, due to moisture absorption and short shelf life.
- Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.
- Make sure that there is no air leakage.
- Charge the system.