Expansion Block/Orifice Tube: Service and Repair

EVAPORATOR CORE ORIFICE

Special Tool(s):

Special Tool(s)

Removal

All vehicles
1. Recover the refrigerant.
2. Position the vehicle on a hoist with the gear selector in NEUTRAL.







3. Disconnect the evaporator core orifice connection.
- Discard the O-ring seal.







4. Inspect the evaporator core orifice for damage.

Vehicles with a serviceable evaporator core orifice







5. Engage the special tool with the evaporator core orifice.







6. Holding the special tool T-handle stationary, rotate the special tool body to remove the evaporator core orifice.

Vehicles with a damaged or broken evaporator core orifice







7. Screw the end of the special tool into the evaporator core orifice.







8. Holding the special tool T-handle stationary, rotate the special tool body to remove the broken evaporator core orifice.

Installation

CAUTION: Refrigerant Compressor Oil (Mineral Oil) F73Z-19577-AA (Motorcraft YN-9-A) should be used to lubricate R-134a refrigerant system O-ring seals only and should not be added to the R-134a refrigerant system 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.







1. Install new O-ring seals on the evaporator core orifice.
- Lubricate the new O-ring seals with PAG oil or equivalent.







2. Position the evaporator core orifice in the special tool.







3. Using the special tool, install the evaporator core orifice.







4. Connect the evaporator core orifice access fitting.
- Install a new O-ring seal lubricated in clean mineral oil.

5. Evacuate, leak test and charge the refrigerant system.