TM 5-3805-281-24-2
Heating and Air Conditioning
R134A COMPONENT OIL CHARGE
Used compressor removed from operation and oil
CAUTION: All new compressors are charged
drained, (See Compressor Oil Removal
with a mixture of nitrogen, R134a refrigerant
procedure in this group.) Add 45 mL (1.5 fl oz.) of
and TY22025 (R134a) refrigerant oil. Wear
new oil.
safety goggles and discharge the
Used compressor removed from operation, oil
compressor slowly to avoid possible injury.
drained, and flushed add 60 mL (2.0 fl oz.) of
new oil.
Compressors can be divided into three categories
when determining the correct oil charge for the system.
NOTE: Components listed below which have been
removed, drained, or flushed, require the
New compressor from parts depot.
removal of the compressor to determine the
Used compressor removed from operation.
correct oil charge. Use the following chart as a
Compressor internally washed with flushing solvent.
guide for adding oil to components:
Determining the amount of system oil charge prior to
130 mL (4.4 fl oz)
installation of compressor on a machine.
65 mL (2.2 fl oz)
Receiver-Dryer
30 mL (1.0 fl oz)
1. When the complete system, lines, and components
Hoses
60 mL (2.0 fl oz)
were flushed add the correct amount of oil as
described.
NOTE: Hoses = 3 mL per 30 cm (0.1 fl oz. per ft).
New compressor from parts depot contains the
Approximate total length equals 600 cm (20 ft).
amount of new oil of 230 20 mL (7.7 0.7 fl
oz.). System requires an additional amount of
If any section of hose is removed and flushed or
new oil of 100 mL (3.4 fl oz.) of new oil.
replaced, measure the length of hose and use the
Used compressor removed from operation, oil
formula to determine the correct amount of oil to be
drained, and flushed requires 330 20 mL (11.1
added.
0.7 fl oz.) of new oil.
CAUTION: DO NOT leave the system or
2. When the complete system was not flushed add the
R134a compressor oil containers open. This
correct amount of oil for the compressor plus
oil easily absorbs moisture. DO NOT spill
amount of oil for each component that was
R134a compressor oil on acrylic or ABS
serviced.
plastic. This oil will deteriorate these
materials rapidly. Identify R134a oil
New compressor from parts depot, drain and
containers and measures to eliminate
return 45 mL (1.5 fl oz.) of oil to the compressor.
accidental mixing of different oils.
(See Compressor Oil Removal procedure in this
group.)
TX,18,UU3713 1913AUG961/1
18
1830
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