9. Lubrication
1. SYSTEM OIL STABILIZATION
Prior to opening the refrigerant system for repairs (except
compressor seizure) the system must be stabilized for cor-
rect oil replenishment.
Follow these procedures:
1) Engine speed set to 1,500 rpm
2) A/C“ON”
3) Air source to recirculate
4) Blower in 4th or high speed position
Make sure the air entering the evaporator is above
26.7°C (80°F).
The discharge (high) side pressure must be above
588 kPa (6 kg/cm
2, 85 psi).
5) Operate the A/C for 10 minutes.
2. SYSTEM DISCHARGE
Slowly, discharge the system starting with the high- pres-
sure side until the pressure drops below 345 kPa (3.52
kg/cm
2, 50 psi), then open the low-pressure side.
3. OIL REPLACEMENT (LHD MODEL)
After stabilization and discharge, replace the component,
adding the appropriate amount of oil (ZXL100PG) to the
new component before installation.
Evaporator 114 m(3.9 US fl oz, 4.0 Imp fl oz)
Receiver drier 5 m(0.2 US fl oz, 0.2 Imp fl oz)
Condenser 2 m(0.07 US fl oz, 0.07 Imp fl oz)
Hose 1 m(0.03 US fl oz, 0.04 Imp fl oz)
If the compressor is replaced (after stabilization):
1) Drain and measure the oil from the original compressor.
2) Drain the oil from the replacement compressor and refill
with the same amount that was drained from the original
[20 m(0.7 US fl oz, 0.7 Imp fl oz) minimum]. Always use
ZXL100PG for the replacement oil.
27
4-7SERVICE PROCEDURE
9. Lubrication
4. OIL REPLACEMENT (RHD MODEL)
After stabilization and discharge, replace the component,
adding the appropriate amount of oil (ND-OIL9) to the new
component before installation.
ConditionProper charging
methodAmount of oil to
be added
m(US fl oz,
lmp fl oz)
Replacement of compressorRemove all oil
from new
compressor and
charge it with
amount of oil
shown in right
column.70 (2.4, 2.5)
Replacement of evaporator—70 (2.4, 2.5)
Replacement of receiver drier
(Liquid tank)Oil need not be
added.—
Replacement of
condenserThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage from
condenser.—50 (1.7, 1.8)
Replacement of
flexible hose or
aluminum pipeThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage.—50 (1.7, 1.8)
Gas leakageThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage.—50 (1.7, 1.8)
If the compressor is replaced (after stabilization):
1) Drain and measure the oil from the original compressor.
2) Drain the oil from the replacement compressor and refill
with the same amount that was drained from the original
[20 m(0.7 US fl oz, 0.7 Imp fl oz) minimum]. Always use
ND-OIL9 for the replacement oil.
28
4-7SERVICE PROCEDURE
9. Lubrication
