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Engine hard to start or will not start
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Incorrect starting procedure
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Review starting procedure
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No fuel
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See Bleeding Fuel System
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Air in fuel line
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Bleed fuel line
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Cold weather
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Use cold weather starting aids
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Slow starter speed
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See Starter Cranks Slowly
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Crankcase oil too heavy
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Use correct oil viscosity
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Incorrect type of fuel
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Consult fuel supplier; use correct fuel type for operating conditions
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Water, dirt, or air in fuel system
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Drain, flush, fill and bleed system
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Clogged fuel filter
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Replace filter
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Dirty or faulty injectors
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Have John Deere Dealer check injectors
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Engine knocks
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Insufficient oil
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Add oil
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Injection pump out of time
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See your John Deere Dealer
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Low coolant temperature
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Remove and check thermostats
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Engine overheating
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See Engine Overheats
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Valve Lash
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See your John Deere Dealer
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Engine runs irregularly or stalls frequently
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Low coolant temperature
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Remove and check thermostats
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Clogged in-line filter or fuel filter
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Replace filters and flush in-line filter
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Water, dirt, or air in fuel system
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Drain, flush, fill and bleed system
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Restricted fuel line
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Clean or replace fuel line
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Dirty or faulty injectors
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Have John Deere Dealer check injectors
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| Symptom |
Problem |
Solution |
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Below normal engine temperature
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Defective thermostat or thermostat incorrectly installed
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Remove and check thermostats
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Defective temperature gauge or sender
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Check gauge, sender and connections
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Viscous fan locked up
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See your John Deere Dealer
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Lack of power
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Engine overloaded
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Reduce load or shift to lower gear
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Low fast idle speed
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See your John Deere Dealer
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Intake air restriction
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Service air cleaner
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Clogged in-line filter or fuel filter
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Replace filter(s)
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Incorrect type of fuel
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Use correct fuel
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Overheated engine
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See Engine Overheats
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Below normal engine temperature
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Remove and check thermostats
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Incorrect valve clearance
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See your John Deere Dealer
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Dirty or faulty injectors
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Have John Deere Dealer check injectors
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Injection system out of time
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See your John Deere Dealer
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Turbocharger not functioning
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See your John Deere Dealer
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Leaking exhaust manifold gasket
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See your John Deere Dealer
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Implement incorrectly adjusted
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See implement operator's manual
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Restricted fuel line
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Clean or replace fuel line
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Incorrect ballast
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Adjust ballast to load
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Low oil pressure
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Low oil level
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Add oil
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Incorrect type of oil
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Drain, fill crankcase with correct quality and viscosity of oil
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| Symptom |
Problem |
Solution |
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High oil consumption
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Crankcase oil too light
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Use correct viscosity oil
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Incorrect oil refill
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See Check Engine Oil Level in the Lubrication Section
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Oil leaks
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Check for leaks in lines, around gaskets and drain plug
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Defective turbocharger
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See your John Deere Dealer
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Engine emits white smoke
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Incorrect type of fuel
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Use correct fuel
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Clogged or dirty air cleaner
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Service air cleaner
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Engine overloaded
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Reduce load or shift to a low gear
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Incorrect starting procedure
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See Starting the Engine in Operating the Engine Section
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Injection nozzles dirty
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See your John Deere Dealer
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Engine out of time
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See your John Deere Dealer
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Turbocharger not functioning
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See your John Deere Dealer
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Engine overheats
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Dirty radiator core, oil cooler, or grille screens
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Remove all trash
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Engine overloaded
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Shift to lower gear or reduce load
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Low engine oil level
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Check oil level. Add oil as required
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Low coolant level
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Fill radiator to correct level, check radiator and hoses for loose connections or leaks
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Faulty radiator cap
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Have serviceman check
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Loose or defective fan belt
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Check belt tensioner. Replace as needed
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Cooling system needs flushing
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Flush cooling system
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Defective thermostat
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Remove and check thermostats
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Defective temperature gauge or sender
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See your John Deere Dealer
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| Symptom |
Problem |
Solution |
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High fuel consumption
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Incorrect type of fuel
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Use correct fuel
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Clogged or dirty air cleaner
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Service air cleaner
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Engine overloaded
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Reduce load or shift to lower gear
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Incorrect valve clearance
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See your John Deere Dealer
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Injection nozzles dirty
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See your John Deere Dealer
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Engine out of time
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See your John Deere Dealer
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Implement incorrectly adjusted
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See implement operator's manual
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Low engine temperature
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Check thermostats
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Excessive ballast
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Adjust ballast to load
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Defective turbocharger
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See your John Deere Dealer
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Engine power reduced (9400)
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Operating with heavy ballast and full power
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See Drive Train Protection-9400 in Operating the Tractor Section
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Using PTO with tractor stationary
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See Drive Train Protection-9400 in Operating the Tractor Section
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