Table 4-1.--Diesel Engine Troubleshooting Chart--Continued
TROUBLE
PROBABLE CAUSE
REMEDY
Starter operates but engine Fuel inadequate for combustion.
Test fuel pump drive.
won't start.
Check supply at tank.
Check fuel cutoff valve.
Change fuel filter.
Test fuel pump volume output.
Test fuel system pressure.
Drain contaminated fuel from sys-
tem.
Injectors clogged.
Service injectors.
Injector timing wrong.
Correct injector timing.
Engine stop solenoid stuck in stop Check electrical stop circuit.
position.
Governor stop lever stuck in stop Service governor linkage. Check
position.
Air entering fuel lines between fuel Check hoses and hose connections
pump and fuel tank.
for ruptures.
Check fuel strainer gasket for air
leak.
Fuel system priming lost (if tractor Prime fuel system.
ran out of fuel).
Air inadequate for combustion.
Check air cleaner.
Emergency shutdown valve closed.
Reset emergency shutdown valve.
ABNORMAL ENGINE
OPERATION
Uneven running or stalling:
Cylinder misfire.
Test cylinder misfiring.
When temperature
Thermostat open.
Replace thermostat.
remains below 170
degrees.
Consistently.
Exhaust valve and/or injector timing Perform turn-up.
fault.
Fuel contaminated.
Drain fuel tanks, add specified
fuel.
At acceleration.
Fuel inadequate due to faulty injec- Service injectors.
tor(s).
Fuel pressure low.
Test fuel pressure.
Exhaust valves not closing.
Adjust valves.
Test cylinder compression.
4-43
