John Deere CD4039DF008 - Manual (Page 73)

Troubleshooting
DPSG,CD03523,49 –19–10AUG99–4/5
Symptom Problem Solution
Engine emits black or grey Improper type of fuel. Use proper fuel.
exhaust smoke
Clogged or dirty air cleaner. Service air cleaner.
Engine overloaded. Reduce load.
Injection nozzles dirty. See your authorized servicing dealer
or engine distributor.
Engine out of time. See your authorized servicing dealer
or engine distributor.
Turbocharger not functioning. See your authorized servicing dealer
or engine distributor.
Engine overheats Engine overloaded. Reduce load.
Low coolant level. Fill radiator to proper level, check
radiator and hoses for loose
connections or leaks.
Faulty radiator cap. Have serviceman check.
Stretched poly-vee belt or defective Check automatic belt tensioner and
belt tensioner. check belts for stretching. Replace
as required.
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 Check coolant temperature with
sender. thermometer and replace, if
necessary.
Incorrect grade of fuel. Use correct grade of fuel.
High fuel consumption Improper type of fuel. Use proper type of fuel.
Clogged or dirty air cleaner. Service air cleaner.
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