A6 Quattro Wagon V6-2.8L (AFC) (1995)
Compressor HVAC: Service and Repair
Zexel Compressor
If A/C compressor is replaced new due to external compressor damage:
-
Discharge A/C system.
-
Remove A/C compressor and plug all open line connections.
-
Remove compressor oil drain plug, drain refrigerant oil from compressor and measure amount.
NOTE:
-
Rotate compressor by hand to speed up oil draining process.
-
Dispose of used refrigerant oil following laws governing hazardous waste disposal
-
Remove oil drain plug from new compressor.
NOTE: Replacement A/C compressors supplied by the parts department are filled with 250 cc ± 20 cc (8.511 oz - 0.711 oz) of refrigerant oil. This is
the total system oil capacity
-
Drain fresh oil from new compressor and save (keep oil in an enclosed container to prevent moisture and dirt contamination).
CAUTION!
In order to ensure lubrication during initial start-up, add a minimum of 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.
-
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 A/C compressor is replaced new as the result of leakage or internal damage (for example, noises or no output):
-
Discharge A/C refrigerant system.
-
Remove A/C compressor.
If A/C compressor had internal damage:
-
Check refrigerant lines and hoses for contamination (metal chips); if present, replace lines/hoses as necessary, 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 compressor oil drain plug, drain refrigerant oil from compressor and measure amount.
NOTE: Rotate compressor by hand to speed up oil draining process. Dispose of used refrigerant oil following laws governing hazardous waste disposal.
-
Remove oil drain plug from new compressor.
NOTE: Replacement A/C compressors supplied by the parts department 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.
-
Drain fresh oil from new compressor and save (keep oil in an enclosed container to prevent moisture and dirt contamination).
CAUTION!
In order to ensure lubrication during initial start-up, add a minimum of 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.
-
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.