Engine

Engine Hard to Start Or Will Not Start.

No fuel.

Fill tank with correct fuel and bleed air from system.

Clogged water filter.

Change filter.

Switches not in correct positions.

Move multi-function lever to neutral.

Water, dirt or air in fuel system.

Drain, flush, fill and bleed system.

Clogged fuel filter.

Replace filter and bleed air.

Wrong type of fuel.

Use correct fuel for operating conditions.

Fuel pump disconnected.

Check wiring to fuel pump.

Dirty or faulty injectors.

See your John Deere dealer.

Too much resistance in starting circuit.

Clean and tighten all connections on batteries and starter relay.

Crankcase oil of too heavy viscosity.

Drain and fill crankcase with oil of correct viscosity and quality.

Low compression.

See your John Deere dealer.

Engine Knocks

Low oil.

Add oil of correct viscosity.

Air in fuel system.

Bleed fuel system.

Injection pump out of time.

See your John Deere dealer.

Injection nozzle valve sticking.

See your John Deere dealer.

Internal engine problem.

See your John Deere dealer.

Triple Display Tachometer Displays Engine Stop Code (1)

Electronic engine control is sending a diagnostic code to the tachometer.

Write the code on a piece of paper and call your John Deere dealer.

HX,AG,SF7238 -19-15APR98-1/5

Engine Runs Irregularly or Stalls Often.

Low coolant temperature.

Run engine until warm.

Clogged water filter.

Change filter.

Clogged fuel filter.

Replace filter and bleed air.

Clogged fuel tank filter vent.

Clean filter vent.

Water, dirt or air in fuel system.

Drain, flush, fill and bleed system.

Dirty or faulty injectors.

See your John Deere dealer.

Injection pump out of time.

See your John Deere dealer.

Bent push rods or sticky valves.

See your John Deere dealer.

Lack of Power.

Clogged water filter.

Change filter.

Overheated engine.

See "Engine Overheats" below.

Intake air restriction.

Clean air cleaner.

Clogged fuel filter.

Replace filter and bleed system.

Clogged water filter.

Replace filter.

Clogged fuel tank filter vent.

Clean filter vent.

High altitude operation.

Engine loses horsepower with increases in altitude. Use correct type of fuel for high altitude.

Dirty or faulty injectors.

See your John Deere dealer.

Injection pump out of time.

See your John Deere dealer.

Air intake leaks.

Check for air leaks and repair.

HX,AG,SF7238 -19-15APR98-2/5

Engine Overheats.

Low coolant level.

Fill radiator with coolant to the correct level. Check hoses and radiator for leaks or loose connections.

Dirty cooling system radiator core or rotary cooling screen.

Clean radiator and rotary screen.

Rotary cooling screen not turning.

Broken drive belt.

Belt off sheaves.

Loose or broken fan belt.

Replace worn belt.

Cooling system limed up.

Drain and flush cooling system.

Defective thermostats.

Remove and check thermostats.

Vacuum duct plugged.

Clean duct.

Fan on low speed.

Increase speed.

Low Oil Pressure.

Low oil level.

Check crankcase oil level and add oil if needed.

Wrong type of oil.

Drain and fill crankcase with oil of correct viscosity.

Oil cooler plugged.

See your John Deere dealer.

Engine Uses Too Much Oil.

Restricted air intake system.

Check air cleaner and clean air intake.

Oil leaks.

Check for leaks in lines and around gaskets and drain plugs.

Too low viscosity crankcase oil.

Drain and fill crankcase with oil of the correct viscosity.

Oil cooler plugged.

Clean oil cooler.

Scored piston.

See your John Deere dealer.

Internal parts worn.

See your John Deere dealer.

HX,AG,SF7238 -19-15APR98-3/5

Engine Uses Too Much Fuel.

Clogged or dirty air cleaner.

Clean air cleaner.

Wrong type of fuel.

Use correct type of fuel for operating conditions.

Dirty or faulty injectors.

See your John Deere dealer.

Engine out of time.

See your John Deere dealer.

Engine Blows Black Or Gray Exhaust Smoke.

Clogged or dirty air cleaner.

Check air cleaner for plugging. Filter element must be clean.

Wrong type of fuel.

Use correct type of fuel for operating conditions.

Dirty or defective injectors.

See your John Deere dealer.

Air in fuel system.

Bleed fuel system.

Defective muffler.

Check muffler for possible damage that might create back pressure.

Engine out of time.

See your John Deere dealer.

Engine Blows White Exhaust Smoke.

Cold engine.

Warm engine to normal operating temperature.

Engine out of time.

See your John Deere dealer.

Wrong type of fuel.

Low cetane fuel will cause misfiring. Use only fuel which has correct cetane number.

Defective thermostat.

Remove and check thermostat.

Batteries Will Not Charge.

Loose or defective alternator belt.

Adjust belt or replace worn belt.

Loose or corroded connections.

Clean and tighten battery connections.

Alternator or voltage regulator not working right.

See your John Deere dealer.

HX,AG,SF7238 -19-15APR98-4/5

Starter Cranks Slowly or Will Not Operate.

Relay not working.

Check relay and wire connections.

Loose or corroded battery connections.

Clean and tighten loose connections.

Key switch worn or terminals loose.

Check switch and terminals.

Too high viscosity crankcase oil.

Drain and fill crankcase with oil of correct viscosity and quality.

HX,AG,SF7238 -19-15APR98-5/5