A/C SYSTEM MAINTENANCE
THIS WORK PACKAGE COVERS
Leak Test, Recovery, Evacuation, Charging
Tools and Special Tools
Tool Kit, Refrigeration Equipment (Item 10, WP
Vehicle parked on level ground (TM 9-2320-363-
Parking/Emergency Brake applied (TM 9-2320-
Engine OFF (TM 9-2320-363-10)
Ignition Key Switch in OFF position (TM 9-2320-
Contact with refrigerant can cause frostbite. Keep hands and face away to prevent personal injury.
Protective face shield must always be worn when refrigerant lines are opened, even if the gauges indi-
cate the system is empty.
Always use caution if a fitting is removed. Slowly loosen the fitting. If the system is still under any
pressure, release it slowly in a well-ventilated area.
DO NOT smoke when servicing A/C or wherever refrigerant gas may be present.
Failure to follow these warnings may result in injury or death to personnel.
Replace receiver/dryer if one or more of the following conditions occurs before you purge A/C system:
A/C system has been previously opened for service.
Too much air or moisture in A/C system, indicated by low refrigerant.
Receiver/dryer has been operated for 2 or more years.
A/C system opened for longer than 5 minutes.
Large A/C system leak (break in hose or line).