Suzuki XL7 2007 Service Manual page 1900

7A-86 Heating, Ventilation and Air Conditioning:
Compressor Oil Balancing
Draining Procedure
NOTE
Drain and measure as much of the refrigerant
oil as possible from the removed
compressor.
1. Drain the oil from both the suction and discharge
ports of the removed compressor into a clean,
graduated container.
Rotate the compressor shaft to assist in draining the
compressor.
2. Measure and record the amount of oil drained from
the removed compressor.
This measurement will be used during installation of
the replacement compressor.
NOTE
During the oil removal procedure, the
condition of the oil should be evaluated.
Compressor oil never breaks down unless
something is wrong with the compressor or
air conditioning (A/C) system. If one or more
of the following conditions exist, replace the
compressor and receiver dehydrator.
3. Inspect the polyalkylene glycol (PAG) oil for the
following conditions:
– The color of the oil is dark brown or black.
– There is a presence of foreign substances, metal
fillings, etc. in the oil.
If the receiver-dehydrator is not replaced, damage
to A/C compressor will occur.
4. Properly discard the used refrigerant oil.
Balancing Procedure
NOTE
The refrigerant oil in the A/C system must be
balanced during compressor replacement.
1. The replacement compressor is shipped with 74 ml
(2.5 oz) of refrigerant oil.
2. Before installing the compressor, the refrigerant oil
may have to be partially drained:
a. Refer to the amount of refrigerant oil recorded
during the compressor removal.
b. 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.