Air Conditioning Compressor Oil Balancing

Compressor Oil Balancing

Draining Procedure

Important: Drain and measure as much of the refrigerant oil as possible from the removed compressor.




1. Remove the compressor crankcase oil drain plug and drain the crankcase into a clean, graduated container.
2. Drain the oil from both the suction and discharge ports of the removed compressor into the same container.
Rotate the compressor shaft to assist in draining the compressor.
3. Measure and record the amount of oil drained from the removed compressor.
This measurement will be used during installation of the replacement compressor.
4. Properly discard the used refrigerant oil.

Balancing Procedure

Important: The refrigerant oil in the A/C system must be balanced during compressor replacement.

1. The replacement compressor is shipped with the total system capacity of refrigerant oil.




2. Before installing the compressor, the refrigerant oil may have to be partially drained:

1. Refer to the amount of refrigerant oil recorded during the compressor removal.
2. Subtract the amount recorded from the total system capacity. Refer to Refrigerant System Capacities.
The difference between the total system capacity and the recorded amount is the calculated amount to be drained from the replacement compressor.

3. Drain the calculated amount of refrigerant oil from the replacement compressor.