TM 5-2410-240-23-3
0254
EVACUATION CONTINUED
000254
N OT E
Evacuation procedure removes air and moisture from A/C system. Do not use evacuation
procedure primarily to indicate A/C system leak.
4. Evacuate A/C system until low pressure gauge (Figure 2, Item 1) indicates vacuum is between 28 and 29 in Hg
(95 and 98 kPa).
a. If specific vacuum cannot be reached, A/C system may have a leak. Repair all leaks and repeat steps 1
through 4.
b. If specific vacuum can be reached, continue to evacuate A/C system for at least 30 minutes and then
proceed to step 5.
Figure 2. Evacuation Hook-Up.
0254
N OT E
Excessive vacuum loss is an indicaton of possible leak in A/C system.
i
Amount of vacuum loss in 5 minutes must not exceed 2 in Hg (7 kPa).
5. If vacuum loss exceeds 2 in Hg (7 kPa) in 5 minutes, repair all leaks and repeat steps 1 through 5. If vacuum
loss does not exceed 2 in Hg (7 kPa) in 5 minutes, A/C system is ready to charge.
END OF TASK
