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TM 9-4120-367-14
TM 07592B-14/1
6.6 EVACUATION. - Continued
Location/Item
Action
Remarks
Vacuum Pump
i.
Open both charging valves.
- Continued
j.
Run the vacuum pump until at least 29 inches of
mercury, measured on the vacuum pump gauge,
is reached.
NOTE
Inability to reach 29 inches of mercu-
ry may indicate a leak or problem
with the pump.
k. Continue running the pump for one more hour,
observing the vacuum pump gauge. If the gauge
needle moves back and forth, there is a refriger-
ant leak which must be located and corrected.
l. Close manifold valves.
m. Close both charging valves.
n. Stop vacuum pump.
Figure 6-4. Evacuating System
6-19
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