TM 5-2410-241-23-3
0263
EVACUATION CONTINUED
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 3, Item 1) indicates vacuum between 28 and 29 inHg
(95 and 98 kPa).
a. If specific vacuum cannot be reached, A/C system may have leak. Repair all leaks and repeat steps 1
through 4.
b. If specific vacuum can be reached, continue to evacuate A/C system for minimum of 30 minutes and then
proceed to Step 5.
Figure 3. Low Pressure Gauge.
0263
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 inHg (7 kPa).
5. If vacuum loss exceeds 2 inHg (7 kPa) in 5 minutes, repair all leaks and repeat steps 1 through 5. If vacuum
loss does not exceed 2 inHg (7 kPa) in 5 minutes, A/C system is ready to charge.
END OF TASK
