Handling Of Compressor Oil - Komatsu PC200-8M0 Shop Manual

100 Air conditioner

Handling of compressor oil

Handling of compressor oil
1. Compressor oil management (DENSO:
ND-OIL8 for R134a)
Although compressor oil differs from engine oil in
that it does not need regular checking or filling, the
following types of problem can occur if the amount
in the system is too high or too low.
Condition
Insufficiency of Lubrication trouble and seizure of com-
oil pressor
Cooling trouble
Excess of oil (Excessive oil stick to parts and lower
heat exchange performance)
Accordingly, compressor oil must be filled to the
specified level, similarly to refrigerant.
2. Filling compressor oil
k
Refrigerant is potentially hazardous to health
and to the environment. Before disconnect-
ing air conditioner hoses, therefore, refriger-
ant should be collected in accordance with
"Precautions for connecting air conditioner
piping."
a If oil for CFC-12 (R-12) is used, lubrication trou-
ble will occur and the compressor may be broken
or seized.
Be sure to use an oil suitable for R134a
(DENSO: ND-OIL8).
a Oil for use with R134a is extremely hygroscopic,
and therefore, the cap must be immediately
closed after use to limit contact with air.
Store the oil can in a dry and ventilated place.
a Precautions for using oil
Do not allow oil for use with R134a to come into
contact with acrylic plastic or polystyrene
surfaces (except a baked finish) as it may
dissolve these plastics.
Check compressor oil in the following cases, and
then add new oil if necessary.
q When much refrigerant is discharged because of
leakage.
q When the compressor is troubled and replaced.
(See 3 below)
q When a cycle parts such as condenser, receiver
drier, evaporator unit, etc. is replaced.
q Quantity of oil to be added when cycle part is re-
placed
PC200, 200LC, 220, 220LC-8M0
Content
Air conditioner part
Air conditioner unit, evaporator
Condenser (including modulator)
Modulator (desiccant) only
Hose (between compressor and cab)
Hose (between compressor and con-
denser)
Hose
(between condenser and cab)
SEN06151-00
Quantity to
be added
(cc)
Approx. 40
Approx. 60
Approx. 20
Approx. 35
Approx. 30
Approx. 10
73
80-100