Compressor HVAC: Service and Repair

AIR CONDITIONING (A/C) COMPRESSOR







Removal and Installation

CAUTION:
- If installing a new air conditioning compressor due to an internal failure of the old unit, you must carry out the following procedures to remove contamination from the air conditioning system.
- If A/C flushing equipment is available, carry out flushing of the A/C system prior to installing a new A/C compressor.
- If A/C flushing equipment is not available, carry out filtering of the A/C system after a new A/C compressor has been installed.
- Install a new evaporator core orifice, as directed by the A/C flushing or filtering procedure.
- Install a new suction accumulator as directed by the A/C flushing or filtering procedure.

- 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.

NOTE:
- If installing a new A/C compressor, the A/C clutch disc and hub, A/C compressor pulley and A/C clutch field coil must be inspected and transferred from the old unit to the new unit if suitable for reuse.
- Installation of a new suction accumulator is not required when repairing the A/C system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.

1. With the vehicle in NEUTRAL, position it on a hoist.
2. If flushing of the A/C system has not been carried out, recover the refrigerant.
3. Remove the drive belt from the A/C compressor pulley.
4. Disconnect the clutch field coil electrical connector.
5. Remove the upper A/C compressor nut.
- To install, tighten to 25 Nm (18 lb-ft).

6. Remove the upper A/C compressor stud.
- To install, tighten to 13 Nm (10 lb-ft).

7. Remove the compressor manifold bolt.
- To install, tighten to 20 Nm (15 lb-ft).

8. Disconnect the manifold.
- Discard the O-ring seals.

9. Remove the 2 lower A/C compressor nuts.
- To install, tighten to 25 Nm (18 lb-ft).

10. Remove the bracket.
11. Remove the 2 lower A/C compressor studs.
- To install, tighten to 25 Nm (18 lb-ft).

12. Remove the A/C compressor.
13. To install, reverse the removal procedure.
- If a new A/C compressor is to be installed, the clutch assembly must be transferred from the old unit to the new unit.
- Install new O-ring seals, lubricated in clean mineral oil.
- If filtering of the A/C system is not to be carried out, lubricate the refrigerant system with the correct amount of clean PAG oil.

14. If filtering of the A/C system is not to be carried out, evacuate, leak test and charge the refrigerant system.