TM 5-2410-240-23-3
0254
LEAK TEST
000254
N OT E
If service work is required on A/C system, refrigerant must be recovered first before
components are removed.
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. Leak test must be performed immediately after unit is turned off. Leak test for
high side needs to be performed 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 rate of 1 in. (25 mm) per second.
2. Leak detector will indicate if leak is present in A/C system.
END OF TASK
RECOVERY
000254
N OT E
Refrigerant identifier will pevent other refrigerants from contaminating R-134a recovery
r
and charging tools. Refrigerant identifier will also detect percentage of air that may be in
A/C system.
If service is required on A/C system, refigerant must be recovered before A/C system
r
components are removed.
1. Use refrigerant identifier to ensure refrigerant in A/C system is R-134a.
0254-2
