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Troubleshooting
RG,RG34710,5608 –19–27JUL06–2/8
Symptom Problem
Solution
Engine hard to start or will not Engine starting under load. Disengage PTO.
start
Improper starting procedure. Review starting procedure.
No fuel. Check fuel tank.
Air in fuel line. Bleed fuel line.
Cold weather. Use cold weather starting aids.
Slow starter speed. See “Starter Cranks Slowly”.
Crankcase oil too heavy. Use oil of proper viscosity.
Improper type of fuel. Consult fuel supplier; use proper
type fuel for operating conditions.
Water, dirt, or air in fuel system. Drain, flush, fill, and bleed system.
Clogged fuel filter. Replace filter element.
Dirty or faulty injection nozzles. Have authorized servicing dealer or
engine distributor check injectors.
Defective glow plugs (Cold weather Test glow plugs (See 2000 hour/24
starting-4045HF475, 6068HF475) month maintenance section)
Electronic fuel system problem (if See your John Deere distributor or
equipped) servicing dealer.
Engine knocks Low engine oil level. Add oil to engine crankcase.
Low coolant temperature. Remove and check thermostat.
Engine overheating. See “Engine Overheats”.
Engine cold Wrong or defective thermostat.
Remove and check thermostat.
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080706
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