TM 5-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Figure 5-90. Installation of Vacuum Gage
NOTE
The engine must be running to check the crankcase vacuum.
a.
Remove crankcase plug-dipstick.
b.
Place vacuum gage in dipstick hole. Make sure it seals well.
c.
Test the vacuum.
(1)
If the vacuum is 1/2 inch to 1 inch (12.7 mm to 25.4 mm) of mercury, the engine is ok.
(2)
If the vacuum is less than 1/2 inch (12.7 mm) of mercury, go to Step 9.
(3)
If there is a positive pressure in the crankcase, go to Step 10.
Step 9.
Check the crankcase breather assembly.
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