Compressor, Replacement Information

If Compressor Is Replaced Due To External Compressor Damage:
- Discharge A/C system.
- Remove A/C compressor and plug all open connections.
- Mark direction of travel for the ribbed belt before removing. Reversing direction could cause the belt to fail.
- Remove oil drain plug from compressor.
- Drain refrigerant oil from compressor and measure.

NOTE:
- Rotate compressor by hand to speed up draining process.
- Dispose of used refrigerant oil following laws governing hazardous waste disposal.
- Replacement A/C compressors supplied by Audi are filled with 250 cc ± 20 cc (8.5 fl oz ± 0.7 fl oz) of refrigerant oil. This is the total system oil capacity.

- Remove oil drain plug from new compressor.
- Drain fresh oil from new compressor and save (in closed container to prevent moisture and dirt contamination).

CAUTION: To ensure lubrication during initial start-up, add at least 80 cc (2.7 oz) of fresh refrigerant (PAG) oil to A/C compressor.

- Refill new compressor with 80 cc (2.7 oz) of fresh refrigerant oil and install oil drain plug.

If total amount of refrigerant oil drained from old compressor was greater than 80 cc (2.7 oz):
- Subtract 80 cc (2.7 oz) (amount of new oil that was added to compressor) from total amount.
- Add resulting amount of fresh refrigerant oil to either evaporator or accumulator.

Example:
100 cc (Amount of oil drained from old compressor)
-80 cc (Amount of fresh oil added to new compressor)
____________________________________________________________________
20 cc (Amount of fresh oil to be added to evaporator or accumulator)

- Install new A/C compressor.
- Evacuate and recharge A/C system.
- Manually rotate A/C compressor 10 rotations before operating system to prevent compressor damage.

If Compressor Is Replaced Due To Leakage Or Internal Damage (For Example; Noises Or No Output):
- Discharge A/C refrigerant system.
- Remove A/C compressor.
- Mark direction of travel for the ribbed belt before removing. Reversing direction could cause the belt to fail.

If A/C Compressor Had Internal Damage:
- Check refrigerant lines and hoses for contamination (metal chips); if present, replace lines or hoses as necessary.
- Replace accumulator and restrictor.

NOTE:
- If lines/hoses are replaced, measure and add appropriate amount of PAG oil before installing.
- If accumulator is replaced, measure and add appropriate amount of PAG oil before installing.
- Remove oil drain plug from compressor and drain refrigerant oil and measure.
- Rotate compressor by hand to speed up draining process.
- Dispose of used refrigerant oil following laws governing hazardous waste disposal.
- Replacement A/C compressors supplied by Audi are filled with 250 cc ± 20 cc (8.5 fl oz ± 0.7 fl oz) of refrigerant oil. This is the total system oil capacity.

CAUTION: To ensure lubrication during initial start-up, add at least 80 cc (2.7 oz) of fresh refrigerant (PAG) oil to A/C compressor.

- Drain fresh oil from new compressor and save (in closed container to prevent moisture and dirt contamination).
- Refill new compressor with 80 cc (2.7 oz) of fresh refrigerant oil and install oil drain plug.

If total amount of refrigerant oil drained from old compressor was greater than 80 cc (2.7 oz):
- Subtract 80 cc (2.7 oz) (amount of new oil that was added to compressor) from total amount.
- Add resulting amount of fresh refrigerant oil to either evaporator or accumulator.

Example:
____________________________________________________________________

100 cc (Amount of oil drained from old compressor)
-80 cc (Amount of fresh oil added to new compressor)
____________________________________________________________________
20 cc (Amount of fresh oil to be added to evaporator or accumulator)

NOTE: Some refrigerant recovery/ recycling/ recharging equipment have provisions for adding refrigerant(PAG) oil during system recharge. If using this method for adding oil, follow all refrigerant recovery/ recycling/ recharging equipment manufacturer's instructions.

- Install new A/C compressor.
- Evacuate and recharge A/C system.
- Manually rotate A/C compressor 10 rotations before operating system to prevent compressor damage.

Service Information:
Low-pressure connection:
O-ring size: 17.2 mm inside diameter, 1.8 mm thickness
40 Nm (30 ft lb)
High-pressure connection:
O-ring size: 14.0 mm inside diameter, 1.8 mm thickness
30 Nm (22 ft lb)