TM 10-3930-675-24-2
AIR CONDITIONER LEAK TEST
THIS WORK PACKAGE COVERS
Inspection, Test
INITIAL SETUP
Maintenance Level
Tools and Special Tools
Organizational
Tool Kit, General Mechanic's (Item 128, WP 0289
Leak Detector, Refrigerant (Item 70, WP 0289 00)
INSPECTION
WARNING
Liquid refrigerant, when exposed to air, quickly evaporates and will freeze skin or eye tissue. Use
care to prevent refrigerant from touching your skin or eyes. Serious injury or blindness may
result if you come in contact with liquid refrigerant.
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 fire or explosion,
which could cause personal injury.
NOTE
Refrigerant is odorless. As a result, all of it may leak away and not be noticed until system stops
cooling. All vehicle refrigerant systems lose some refrigerant depending on the condition of the
system. Higher loss rates signal a need to locate and repair leaks.
Leaks are most often found at the compressor hose connections and at various fittings and joints
in the system. If unapproved replacement hoses are installed, refrigerant can be lost through hose
permeation.
1.
Visually inspect refrigerant system for A/C lubricant leakage and corrosion and damage to lines, hoses, and other com-
ponents.
2.
Visually inspect lowest points of fittings, hoses, and lines for indications of lubricant leakage.
TEST
Use a leak detector in accordance with manufacturer's instruction manual and check for refrigerant leakage at hose con-
nections, fittings, and in areas where leakage might occur. If leaks are indicated, notify Direct Support Maintenance of leak in
A/C system.
END OF WORK PACKAGE
