Engine

Symptom Problem Solution

Engine Will Not Crank

Hydrostatic ground speed control lever not in neutral

Move lever to neutral and center steering wheel.

Steering wheel not locked

Turn wheel slowly until it locks.

Neutral start switches inoperative

Check switches and wire connections. Replace switches if necessary.

Platform switch is on

Move switch to off.

Engine Hard to Start or Will Not Start

No fuel

Fill tank with correct fuel.

Water, dirt, or air in fuel system

Drain, flush, fill and bleed system.

Incorrect grade of fuel

Consult fuel suppler; use correct fuel for operating conditions.

Fuel pump hand primer lowered

Pull lever up.

Cold weather

Use cold weather starting aids.

Low compression

See your John Deere dealer.

Low battery output

Have battery tested. Check battery electrolyte level.

Faulty starter

See your John Deere dealer.

Wiring shorted, open fuse

Check continuity of wiring and fuse.

Poor connection in starting circuit

Clean and tighten all connections on batteries and starter.

Injection pump fuel shutoff valve

See your John Deere dealer.

Dirty or faulty injectors

See your John Deere dealer.

Fuel filter plugged or full of water

Replace filter element or drain water.

Crankcase oil of too heavy viscosity

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

OME,4890,095,A -19-10FEB97-1/5


Symptom Problem Solution

Engine Knocks

Insufficient oil

Add oil.

Fuel injection pump out of time

See your John Deere dealer.

Low coolant temperature

Remove and check thermostat. (See "Engine Overheats" in this section.)

Incorrect grade of fuel

Use correct fuel.

Injection nozzle valve sticking

See your John Deere dealer.

Loose or failed main bearings or connecting rod bearings, worn pistons and cylinders

See your John Deere dealer.

Air in fuel system

Bleed fuel system.

Engine overheating

See "Engine Overheats" in this section.

Engine Runs Irregularly or Stalls Frequently

Low coolant temperature

Run engine until sufficiently warm; also check thermostat.

Clogged fuel filter

Replace filter element and bleed system.

Water, dirt, or air in fuel system

Drain, flush, fill, and bleed system.

Throttle linkage loose

Check linkage.

Dirty or faulty injectors

See your John Deere dealer.

Vent on fuel tank obstructed

Clean vent in soapy water and blow dry.

OME,4890,095,A -19-10FEB97-2/5


Symptom Problem Solution

Lack of Power

Overheated engine

See "Engine Overheats" in this section.

Intake air restriction

Service air cleaner.

Clogged fuel filter

Replace filter element and bleed system.

Fuel injection pump advance not working

See your John Deere dealer.

Low fast idle speed

See your John Deere dealer.

Dirty or faulty injectors

See your John Deere dealer.

Engine overloaded

Reduce load.

Incorrect grade of fuel

Use correct fuel.

Below normal engine temperature

Remove and check thermostat.

Incorrect valve clearance

See your John Deere dealer.

Injection pump out of time

See your John Deere dealer.

Turbocharger not functioning

See your John Deere dealer.

Leaking exhaust manifold gasket

See your John Deere dealer.

Restricted fuel line

Clean or replace fuel line.

Below Normal Engine Temperature

Defective thermostat

Remove and check thermostat.

Defective temperature gauge or sender

Check gauge, sender, and connections.

OME,4890,095,A -19-10FEB97-3/5


Symptom Problem Solution

Engine Overheats

Low coolant level

Fill radiator upper surge tank to proper level. Check radiator and hoses for loose connections and leaks.

Engine overloaded

Reduce load.

Defective radiator cap

Replace cap.

Loose or defective fan belt

Check belt tension. Replace belt if necessary.

Check automatic belt tensioner.

Dirty radiator core, oil cooler, air conditioner condenser or grill screen

Remove trash and dirt.

Low engine oil level

Check oil level. Add oil as required.

Cooling system needs flushing

Flush cooling system.

Defective thermostat

Remove and check thermostat.

Defective temperature gauge or sender

Check water temperature with thermometer and replace, if necessary.

Incorrect grade of fuel

Use correct fuel.

Defective water pump

See your John Deere dealer.

Low Oil Pressure

Low oil level

Add oil.

Incorrect type of oil

Drain, fill crankcase with correct oil.

High Oil Consumption

Crankcase oil too light

Drain and refill with proper viscosity oil.

Oil leaks

Check for leaks in lines, around gaskets, and drain plug.

Restricted crankcase vent tube

Clean vent tube.

Defective turbocharger

See your John Deere dealer.

OME,4890,095,A -19-10FEB97-4/5


Symptom Problem Solution

High Fuel Consumption

Incorrect grade of fuel

Use correct fuel.

Clogged or dirty air cleaner

Service air cleaner.

Engine overloaded

Reduce load.

Incorrect valve clearance

See your John Deere dealer.

Defective turbocharger

See your John Deere dealer.

Engine out of time

See your John Deere dealer.

Low engine temperature

Check thermostat.

Injection nozzles dirty or damaged

See your John Deere dealer.

Engine Emits White Smoke

Incorrect grade of fuel

Use correct fuel.

Cold temperature

Warm up engine to normal operating temperature.

Engine out of time

See your John Deere dealer.

Clogged or dirty air cleaner

Service air cleaner.

Engine overloaded

Reduce load.

Injection nozzles dirty

See your John Deere dealer.

Turbocharger not functioning

See your John Deere dealer.

Defective thermostat

Remove and check thermostat.

Engine Emits Black or Gray Exhaust Smoke

Incorrect grade of fuel

Use correct fuel.

Restricted air cleaner

Service air cleaner.

Fuel injection nozzles dirty or damaged

Have your John Deere dealer check the injectors.

Engine overloaded

Reduce load.

Engine out of time

See your John Deere dealer.

Turbocharger not functioning

See your John Deere dealer.

OME,4890,095,A -19-10FEB97-5/5