Cooling System

SymptomProblemSolution

Engine Overheats

Lack of coolant in cooling system.

Fill cooling system to proper level.

 

Radiator core dirty.

Clean radiator as required.

 

Engine overloaded.

Reduce engine load.

 

Too low crankcase oil level.

Fill crankcase to proper oil level.

 

Loose or defective fan belt.

Replace fan belt as required. Check belt tensioner.

 

Defective thermostat(s).

See your John Deere dealer.

 

Damaged cylinder head gasket.

See your John Deere dealer.

 

Defective coolant pump.

See your John Deere dealer.

 

Defective radiator cap.

Replace radiator cap as required.

Coolant in Crankcase

Cylinder head gasket defective.

See your John Deere dealer.

 

Cylinder head or block cracked.

See your John Deere dealer.

 

Cylinder liner seals leaking.

See your John Deere dealer.

 

Leaking oil cooler.

See your John Deere dealer.

 

Defective oil cooler O-rings.

See your John Deere dealer.

 

Faulty coolant pump seal; weep hole plugged; coolant leaking through bearing.

See your John Deere dealer.

Coolant Temperature Below Normal

Defective thermostat(s).

See your John Deere dealer.

KR43067,0000C69-19-20121206