TM 9-4940-549-14&P
Table 3-2. Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine Knocks or Develops Excessive Noise.
3.
Crankcase oil supply low.
Add oil to proper level. If noise continues with oil at proper level,
stop engine and notify your supervisor.
4.
Engine Stops Suddenly.
Fuel tank empty.
Step 1.
Fill fuel tank.
Dynamotor-welder overspeed safety switch trips.
Step 2.
Reset switch (fig. 2-5)
If switch trips again, notify your supervisor.
5.
Engine Overheats.
Step 1.
Radiator shutter closed.
Open radiator shutter.
Step 2.
Coolant low.
Fill cooling system.
6.
Engine Exhaust Smoke Black.
Air cleaner dirty.
Step 1.
Service air cleaner (para. 3-8).
Step 2.
Crankcase oil level too high.
Drain oil to proper level.
Step 3.
Fuel tank vent plugged.
Clean fuel tank vent.
3-7
