TM 5-6640-212-14
Table 3-3. Vacuum Pump Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
INSUFFICIENT VACUUM PRESSURE.
Step 1.
Check for low oil level.
Fill pump to prescribed oil level.
Step 2.
Check for leakage in line.
Locate leak and repair line.
Step 3.
Check if motor is functioning properly.
a.
Check wiring for shorts or loose connections.
b.
Check drive belt for tightness. Correct condition.
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