Troubleshooting Guide

Symptom: Excessive black smoke at full load (Hot, unburned fuel)

• Dirty primary or secondary air cleaner
• Overloading
• Overfueling
• Operating in a gear that is too high
• Faulty turbocharger

Symptom: Blue smoke (indicates oil consumption)

• Leaking head gasket
• Cracked head and/or liners
• Faulty injector
• Incorrect starting procedure
• Incorrect fuel injection timing
• Poor fuel quality

Symptom: Increased oil consumption/excess blow-by

• High hours on engine
• Worn rings and/or liners
• Worn turbocharger seals
• Worn valve guides

Symptom: Unusual noises

• Malfunctioning fuel nozzles and/or injectors
• Worn piston pin bushings
• Worn rod and/or main bearings
• Malfunctioning turbocharger
• Too much valve lash

Symptom: Lack of power

• Dirty air cleaner
• Dirty fuel filter
• Incorrect governor linkage adjustment
• Malfunctioning fuel nozzles and/or injectors
• Slipping torque converter
• Improper set point
• Poor fuel quality
• Increased fuel consumption
• Fuel leak

Symptom: Oil level overfill

• Coolant and/or fuel leak into crankcase
• Improper oil fill

Symptom: Debris in oil filter

• Dirt entry
• Damaged bearings
• Coolant and/or fuel leak into crankcase
• Excessively long oil drain interval
• Incorrect oil used

Catching problems in their early stages can help prevent a costly major overhaul. If you pay for a major engine overhaul, it is almost impossible to reap the value of a construction or other machine before another major component needs major repair.

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