TM 5-4310-393-14
TABLE 3-1. OPERATOR/CREW TROUBLESHOOTING PROCEDURES.
MALFUNCTION/SYMPTOM
PROBABLE CAUSE
TEST OR INSPECTION/CORRECTIVE ACTION
ENGINE
1. ENGINE HARD TO CRANK.
Compressor loaded.
Open drain/purge valves to unload the compressor.
Oil viscosity too high.
Refer to Figure 3-1.
2. ENGINE WILL NOT START.
Fuel supply.
Check fuel tank for fuel available. Pull out extra fuel button and attempt to start again.
Check valve.
Disconnect supply hose from fuel pump.
a. If steady flow is not present, replace fuel filter per paragraph 4-15.
b. If engine still will not start, refer to General Support.
Air supply.
Check air cleaner.
a. Check rain hood for blockage and/or damage to the system.
b. If no other reason for blockage is apparent, service air filter (paragraph 3-15.2).
3. ENGINE SPEED IS UNSTEADY (HUNTING).
Engine problem
Notify General Support.
4. DENSE SMOKE FROM ENGINE EXHAUST AFTER START.
Oil level.
Shut down engine and check oil level (paragraph 3-4). Correct as necessary.
Air supply.
See 2 above.
3-10
