TM 5-3805-296-23-4
0248
LEAK TEST
000248
NOTE
When servicing A/C system, recover refrigerant first before removing any components.
A/C system must contain at least 0.88 lb (0.4 kg) of refrigerant. Manifold gauge set can
determine if pressure exists in A/C system.
Leaks in high side of A/C system are more easily found if A/C is operated for 5 to 10
minutes before testing. Perform leak test immediately after unit is turned off and before
pressure in A/C system equalizes.
Leaks in low side of A/C system are more easily found if A/C has been shut off for 5 to 10
minutes. Leak test for low side needs to be performed before pressure in A/C system
equalizes.
1. Move leak detector sensor tip along possible leak points at a rate of 1 in. (25 mm) per second.
2. Leak detector will indicate if a leak is present in A/C system.
END OF TASK
0248-2