Engine

Engine hard to start, will not start.

Safety switch not activated.

Move hydro lever to neutral. Inspect switch.

Tow valve in "Tow" position (if equipped).

Change valve to "Operate" position.

Throttle position.

Place in fast position.

Engine flooded.

Wait a few minutes before cranking engine.

Fuel tank empty.

Add fuel and bleed fuel system.

Plugged fuel filter.

Replace filter element and bleed system.

Water, dirt or air in fuel system.

Drain, flush, fill and bleed fuel system.

Improper type or old fuel.

Consult fuel chart and use proper type of fuel for operating conditions.

Excessive resistance in starting circuit.

Clean and tighten all connections on battery and starter.

Low battery output.

Check battery voltage. Clean battery. Recharge if necessary.

Crankcase oil of too heavy viscosity.

Drain and fill crankcase with John Deere TORQ-GARD SUPREME ® oil of proper viscosity and quality.

Throttle linkage loose or not adjusted properly.

Check throttle linkage and adjust if necessary.

Solenoid disconnected.

Check wiring.

Faulty injection pump solenoid.

Replace solenoid.

Dirty or faulty injectors.

See your John Deere dealer.

Engine timing incorrect.

See your John Deere dealer.

TORQ-GARD SUPREME is a trademark of Deere & Company

AG,OUO1011,447 -19-29APR99-1/7

Sticking valves.

See your John Deere dealer.

Low compression.

See your John Deere dealer.

Engine knocks.

Insufficient oil.

Add oil of proper viscosity and quality.

Clogged air intake.

Clean air intake.

Air in fuel system.

Clean and bleed fuel system.

Low coolant temperature.

Incorrect or defective thermostat.

Injection nozzle valve sticking.

See your John Deere dealer.

Injection pump out of time.

See your John Deere dealer.

Loose or failed main bearing or connecting rod bearing, worn pistons and cylinders.

See your John Deere dealer.

Engine runs irregularly or stalls frequently.

Low coolant temperature.

Run engine until sufficiently warm; also check thermostat.

Low fuel level.

Add fuel and check system.

Plugged fuel filter.

Replace filter element and bleed system.

Water, dirt or air in fuel system.

Drain, flush, fill and bleed system. Tighten fuel connections.

Injection pump solenoid wire loose.

Check wiring.

Dirty or faulty injectors.

See your John Deere dealer.

Injection pump speed advance.

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.

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Lack of power.

Throttle position or speed adjustments incorrect.

Use proper throttle position and speed adjustment.

Engine overload.

Reduce load.

High altitude operation.

Engine loses horsepower with increase in altitude. Use proper type of fuel for high altitude.

Intake air restrictions.

Clean air cleaner.

Plugged fuel filter.

Replace filter element and bleed system.

Plugged or restricted shut-off valve.

Check shut-off valve.

Unsatisfactory fuel.

Use fresh fuel of proper type.

Improper thermostat.

Change to proper thermostat.

Overheated engine.

See "ENGINE OVERHEATS".

Dirty or faulty injectors.

See your John Deere dealer.

Injection pump out of time.

See your John Deere dealer.

Turbocharger not functioning.

See your John Deere dealer.

Improper valve clearance.

See your John Deere dealer.

Automatic advance not working.

See your John Deere dealer.

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Engine overheats

Engine side screens plugged.

Clean screens.

Dirty cooling system radiator core, A.C. condenser or screens.

Remove all foreign matter from exterior or radiator core, A.C. condenser and screens. Steam clean if necessary.

Engine overloaded.

Reduce load.

Low coolant level.

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

Defective thermostat, pressure cap, switch or gauge.

Remove and check.

Cooling system limed up.

Drain and flush cooling system.

Loose or defective fan belt.

Replace belt and/or tensioner.

Wrong oil viscosity.

Change to proper oil viscosity.

Leaking head gasket.

See your John Deere dealer.

Engine timed too late.

See your John Deere dealer.

Engine temperature below normal.

Defective thermostat, gauge or sender unit.

Remove and check.

Low oil pressure.

Low oil level.

Check crankcase oil level on dipstick and add oil if necessary.

Improper type of oil.

Drain and fill crankcase with John Deere TORQ-GARD SUPREME ® oil of proper viscosity and quality.

TORQ-GARD SUPREME is a trademark of Deere & Company

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Engine uses too much oil.

Excessive engine speed.

Check speed adjustment.

Restricted air intake system.

Check air cleaner and swab out air intake.

Too low viscosity crankcase oil.

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

Oil leaks or engine overheating.

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

High oil pressure.

See your John Deere dealer.

Internal parts worn.

See your John Deere dealer.

Scored pistons, stuck rings or worn valve guides.

See your John Deere dealer.

Engine uses too much fuel.

Engine overloaded.

Reduce load.

Clogged or dirty air cleaner.

Clean air cleaner.

Improper type of fuel.

Use proper type fuel for operating conditions.

Dirty or faulty injectors.

See your John Deere dealer.

Engine out of time.

See your John Deere dealer.

Automatic advance not working.

See your John Deere dealer.

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Engine emits black or gray exhaust smoke.

Engine overloaded.

Reduce load.

Clogged or dirty air cleaner.

Check air cleaner for restrictions. Be sure filter element is clean.

Improper fuel type.

Use proper type of fuel for operating conditions.

Air in fuel system.

Bleed fuel system. Check all connections and fuel tank level.

Defective muffler.

Check the muffler for possible damage which might create back pressure. Clean or replace muffler. See your John Deere dealer.

Dirty or faulty injectors.

See your John Deere dealer.

Engine out of time.

Make sure injection pump is timed properly (see your John Deere dealer).

Automatic advance not working.

See your John Deere dealer.

Engine emits white exhaust smoke.

Cold engine.

Warm engine to normal operating temperatures.

Improper type of fuel.

Low octane fuel will cause misfiring. Use only fuel which has recommended cetane or octane number.

Thermostat defective or too cold.

Remove and check thermostat.

Engine out of time.

Make sure injection pump is timed properly (see your John Deere dealer).

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Battery will not charge.

Loose alternator belt.

Replace belt and/or tensioner.

Loose or corroded connections.

Clean and tighten battery connections.

Alternator not functioning properly.

See your John Deere dealer.

Defective battery.

Check voltage and/or specific gravity and electrolyte level.

Starter cranks slowly or will not crank.

Safety switch not activated.

Move hydro lever to neutral.

Loose or corroded harness or battery connections.

Clean and tighten loose connections.

Low battery output.

Use voltmeter to check state of charge.

Starter solenoid defective.

Repair or replace, if necessary.

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