Engine Troubleshooting

Symptom Problem Solution

Engine Hard to Start or Will Not Start

Incorrect starting procedure

Review starting procedure

Blown fuse

Check fuse 32 and 24

No fuel

Check fuel tank

Air in fuel line

Bleed fuel line (turn key to RUN for 60 seconds with engine off)

Cold weather

Use cold weather starting aids

Slow starter speed

See Starter Cranks Slowly

Crankcase oil too heavy

Use correct oil viscosity

Incorrect type of fuel

Consult fuel supplier; use correct fuel type for operating conditions

Water, dirt, or air in fuel system

Drain, flush, fill and bleed system

Clogged fuel filter

Replace filter elements

Dirty or faulty injectors

Have your John Deere dealer check injectors

Injection pump shut-off not reset

Turn key switch to OFF then to ON

Engine Knocks

Insufficient oil

Add oil

During warm up, pilot injection system will activate and deactivate depending on engine operating temperature

This is normal operation

Low coolant temperature

Replace thermostats

Engine overheating

See Engine Overheats

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Symptom Problem Solution

Engine Runs Irregularly or Stalls Frequently

Low coolant temperature

Replace thermostats

Clogged fuel filters

Replace filter elements

Water, dirt, or air in fuel system

Drain, flush, fill and bleed system

Vent on fuel tank obstructed

Clean vent under rear cab panel

Dirty or faulty injectors

Have your John Deere dealer check injectors

Below Normal Engine Temperature

Defective thermostat

Replace thermostats

Defective temperature gauge or sender

See your John Deere dealer

Variable speed fan running too fast

See your John Deere dealer

Variable Fan Speed Drive Surges at Low Engine RPM

NOT normal

See your John Deere dealer

Throttle Does Not Allow Full Engine RPM

Field Cruise may be on and limiting max engine rpm

Check the settings for Field Cruise in the CommandCenter. Insure full rpm has been selected on the display

Cold oil can limit engine speed to 1500 rpm

Warm up transmission/hydraulic oil. If problem persists, see your John Deere dealer.

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Symptom Problem Solution

Lack of Power

Engine overloaded

Reduce load or shift to lower gear

Low fast idle speed

Insure Field Cruise is set to max rpm

If problem persists, see your John Deere dealer

Intake air restriction

Service air cleaner

Clogged fuel filters

Replace fuel filter elements

Incorrect type of fuel

Use correct fuel

Overheated engine

See Engine Overheats

Below normal engine temperature

Remove and check thermostats

Incorrect valve clearance

See your John Deere dealer

Dirty or faulty injectors

Have your John Deere dealer check injectors

Turbocharger not functioning

See your John Deere dealer

Leaking exhaust manifold gasket

See your John Deere dealer

Implement incorrectly adjusted

See implement operator's manual

Restricted fuel inlet on tank

Clean or replace fuel line

Incorrect ballast

Adjust ballast to load, see section 75, Performance Ballasting

Low Oil Pressure

Low oil level

Add oil

Incorrect type of oil

Drain, fill crankcase with correct quality and viscosity of oil

High Oil Consumption

Crankcase oil too light

Use correct viscosity oil

Oil leaks

Check for leaks in lines, around gaskets and drain plug

Defective turbocharger

See your John Deere dealer

Restricted engine breather tube

Unclog breather tube

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Symptom Problem Solution

Engine Emits Smoke

Incorrect type of fuel

Use correct fuel

Clogged or dirty air cleaner

Service air cleaner

Engine overloaded

Reduce load or shift to a low gear

Injection nozzles dirty

See your John Deere dealer

Turbocharger not functioning

See your John Deere dealer

Engine Overheats

Dirty radiator core, oil cooler, or grille screens

Remove all trash and clean coolers

Engine overloaded

Shift to lower gear or reduce load

Low engine oil level

Check oil level. Add oil as required

Low coolant level

Fill de-aeration tank and recovery tank to correct level. Check radiator and hoses for loose connections or leaks

Faulty radiator cap

Replace radiator cap

Loose or defective fan belt

Check and replace belt as needed

Fan drive running too slow

Make sure bleed screw under fan drive is fully closed

Cooling system needs flushing

Flush cooling system

Defective thermostat

Replace thermostats

Defective temperature gauge or sender

See your John Deere dealer

High Fuel Consumption

Clogged or dirty air cleaner

Service air cleaner

Engine overloaded

Reduce load or shift to lower gear

Injection nozzles dirty

See your John Deere dealer

Implement incorrectly adjusted

See implement operator's manual

Excessive ballast

Adjust ballast to load. See section 75, Performance Ballasting

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