Expansion Valve: Service and Repair

WARNINGS:
- Avoid breathing a/c refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat. use only approved service equipment meeting SAE requirements to discharge R-134a system. If accidental system discharge occurs, ventilate work area before resuming service.

- R-134a service equipment or vehicle A/C system should not be pressure tested or leak tested with compressed air. Some mixtures of air/R-134a have been shown to be combustible at elevated pressures. These mixtures are potentially dangerous and may result in fire or explosion causing injury or property damage.

Fig 30 Suction And Liquid Lines At Expansion Valve:

REMOVAL
1. Remove refrigerant from the A/C system using a refrigerant recovery machine.
2. Remove ground wire from the expansion valve.
3. Remove bolt attaching suction and liquid lines to expansion valve.

Fig 31 Expansion Valve Bolts:

4. Remove two retaining bolts from expansion valve.

Fig 32 Expansion Valve:

5. Remove expansion valve.
6. Remove expansion valve gasket.

CAUTION: Always install a new gasket when replacing expansion valve.

INSTALLATION
For installation, reverse the above procedures.
- Tighten new expansion valve to 11 Nm (100 in. lbs.).