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 the flushing of the air conditioning system prior to installing a new air conditioning compressor.
- If A/C flushing equipment is not available, carry out filtering of the air conditioning system after a new air conditioning 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.

NOTE: Installation of a new suction accumulator is not required when repairing the A/C system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the suction accumulator.

1. If flushing of the A/C system has not been carried out, recover the refrigerant.

2. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury.

With the vehicle in NEUTRAL, position it on a hoist.

3. Remove the drive belt from the A/C compressor pulley.
4. Disconnect the field coil electrical connector.
5. Remove the 2 A/C compressor fitting nuts and disconnect the fittings.
- Discard the gasket seals and O-ring seals.
- To install, tighten to 15 Nm (11 lb-ft).

6. NOTE: The upper rear and lower rear A/C compressor studs must be removed with the A/C compressor.

Remove the 3 A/C compressor studs.
- To install, tighten to 25 Nm (18 lb-ft).

7. Remove the A/C compressor.

8. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury.

To install, reverse the removal procedure.
- Install new O-ring seals and gasket seals.
- If filtering of the refrigerant system is not to be carried out, lubricate the refrigerant system with the correct amount of clean PAG oil.

9. If filtering of the refrigerant system is not to be carried out, evacuate, charge and leak test the refrigerant system.