Table 3-2. Operator/Crew Troubleshooting
TEST OR INSPECTION
1. ENGINE FAILS TO CRANK WHEN STARTER BUTTON IS DEPRESSED.
Check to see if battery electrolyte level is above the top of the plates.
If electrolyte level is below the top of the plates, add distilled or clean water to the cells until
the electrolyte level is 3/8 inch (9.5 mm) above the plates. Recharge battery.
Inspect for loose, corroded, or broken battery cables.
Clean corroded cables and battery terminals. Tighten loose connections at battery terminals,
ground, and starter. If cables are broken, notify organizational maintenance.
Starter switch wires on instrument panel loose or broken.
If starter switch wires are loose, tighten the terminal connections. If wires are broken, notify
Any other cause.
Notify organizational maintenance if engine will still not crank after performing steps 1 through
2. ENGINE CRANKS BUT FAILS TO START WHEN STARTER BUTTON IS DEPRESSED.
Check ignition switch. It must be in ON position.
Pull ignition switch outward to ON position.
Safety pushbutton switch is not being pressed along with starter button.
Press safety pushbutton switch simultaneously with starter pushbutton and hold in until
engine oil pressure reaches at least 4 psi (0.28 KG/CM2).
Check for empty fuel tank.
Fill the fuel tank if empty or low.
Check for water or dirt in the fuel system.
Drain the fuel tank and refill with clean fuel. Replace the engine fuel filter. Purge fuel system
Check for air in fuel injection system.
Disconnect fuel pressure gauge hose from elbow at fuel injection pump inlet and purge the
system of air (figure 3-17). Manually operate the fuel transfer pump lever until air-free fuel
flows from the hose connection elbow; then reconnect the hose.