New service ports are used to ensure that the sys-
tem is not accidentally filled with the wrong refriger-
ant.
Due to the different characteristics of R-134a it re-
quires all new service procedures. Refer to Refriger-
ant Service Procedures in this section before making
any repairs to the air conditioning system.
Chrysler Corporation recommends that a
R-134a refrigerant Recovery/Recycling Station
that meets SAE standard J2210 be used.Refer tothe operating instructions provided with the equip-
ment for proper operation.
REFRIGERANT OIL
R-134a refrigerant requires a special type of com-
pressor oil. The system uses polyalklene glycol syn-
thetic wax-free refrigerant oil SP-20 PAG. No other
oil should be used.
R-12 compressor oil can not be mixed with the
R-134a compressor oil. They ARE NOT compatible.
2 AIR CONDITIONINGJ
REFRIGERANT OIL
It is important to have the correct amount of oil in
the A/C system. This will ensure proper lubrication of
the compressor. Too little oil will result in damage to
the compressor. Too much oil will reduce the cooling
capacity of the system.
The oil used in the SD-709 compressor is a poly-
alkylene glycol synthetic oil SP-20 PAG. This is a
wax-free refrigerant oil. Only refrigerant oil of the
same type should be used to service the system. Do
not use any other oil. The oil container should be
kept tightly capped until it is ready for use and then
capped after use to prevent contamination. Refriger-
ant oil will quickly absorb any moisture it comes in
contact with.
It will not be necessary to check oil level in the
compressor or to add oil unless there has been an oil
loss. This may be due to a rupture or leak from a
line, shaft seal, evaporator or condenser. Oil loss at a
leak point will be evident by the presence of a wet,
shiny surface around the leak.Add an additional 28 grams (1 fluid oz.) of
compressor oil to the system when a receiver-
drier, condenser or evaporator core is replaced.
OIL LEVEL
When an A/C system is assembled at the factory,
all components (except the compressor) are refriger-
ant oil free. After the system has been charged and
operated, the oil in the compressor is dispersed
through the system. The evaporator, condenser and
compressor will retain a significant amount of oil (re-
fer to the Refrigerant Oil Capacities Chart).
When a component is replaced, the specified
amount of refrigerant oil must be added. When the
compressor is replaced, the oil must be drained from
the replaced compressor and measured. Drain all the
oil from the new compressor. Add back into the new
compressor the amount of oil that was drained out of
the old compressor.
JAIR CONDITIONING9
