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TM 9-2320-312-24-1
AIR CONDITIONING SYSTEM MAINTENANCE - CONTINUED
0149 00
CHARGING - CONTINUED
c.
Start engine and run it at 1500 rpm. Set cab air conditioner controls at maximum cooling and fan speed; refrigerant
compressor must engage.
d.
If a charge did not enter system, place tank (bulk container) in upright position, then open LOW SIDE valve to
draw vapor into system; leave valve open until correct weight of refrigerant has entered system, then close low side
valve.
NOTE
If refrigerant is slow to enter system because of low outside temperatures, vaporization can be quickened by
placing refrigerant tank in a tub of warm water, no warmer than 125F (52C).
3.
Disconnect high side hose. With engine running, open low side and high side hose valves to recover refrigerant from
lines.
4.
Shut down engine.
WARNING
Refrigerant R-134a air conditioning systems should not be pressure tested or leak tested with compressed
air. Combustible mixtures of air and R-134a may form, resulting in a fire or explosion, which could cause
personnel injury or death.
5.
Leak test air conditioning system (WP 0057 00).
6.
Check operation of air conditioning system (TM 9-2320-312-10).
7.
Lower cab (TM 9-2320-312-10).
END OF WORK PACKAGE
0149 00-6

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