Expansion Valve: Service and Repair

THERMOSTATIC EXPANSION VALVE

REMOVAL

1. CAUTION: Refrigerant Compressor Oil (Mineral Oil) F73Z-19577-AA (Motorcraft YN-9-A) should be used to lubricate R-134a refrigerant system O-rings seals only and should not be added to R-134a refrigerant systems as an A/C compressor lubricant. PAG Refrigerant Compressor Oil F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B only should be used as an A/C compressor lubricant.

Remove the A/C evaporator core.







2. NOTE: Care must be taken not to damage the capillary bulb or tube.

Separate the capillary bulb from the outer evaporator outlet tube.
1 Remove the A/C insulating tape and save for reuse.
2 Remove the clip securing the capillary bulb to the tube.







3. Remove the thermostatic expansion valve (TXV).

1 CAUTION: Use a wrench on each side of the fitting to prevent damage to the A/C fitting.

Disconnect the refrigerant lines.

2 Remove the TXV.

INSTALLATION
1. To install, reverse the removal procedure.
- Install new O-ring seals lubricated in clean mineral oil.