Operation and Maintenance Manual SC9DF Electronically Controlled Diesel Engine for Agricultural Equipment
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5.9 Black smoke
Possible causes Troubleshooting methods
The engine is overload Shift to lower gear
Air enters the fuel system Discharge the air and check suction parts for leakage
The intake system is blocked Check the air intake system for clogging
The turbocharger is failed Replace the turbocharger
The fuel injector has failure Consult the authorized service station
Check whether the diagnosis indicator
lamp lights up
Consult the authorized service station
5.10 Coolant temperature is too low
Possible causes Correction
Too much cold air flow through the
radiator
Check the fan and fan clutch, refer to the instructions by the fan clutch
manufacturer
The radiator shutter is stuck at maximum
opening
Check the shutter and replace it if necessary
The temperature sensor is failed Check and calibrate the sensor
The thermometer is malfunction Calibrate the thermometer and replace it if necessary
The thermostat is damaged Replace the thermostat
5.11 Excessive noise
Possible causes Correction
Driving belt gives out howling Check the belt drive system
There is leakage in the air intake and
exhaust systems
Check and remove the leakage
The valve clearance(s) is excessive Check and adjust valve clearances
Turbocharger is noisy Check whether the impeller(s) touches its housing
Oil in the engine is insufficient Check and refill oil
The drive gear is noisy Consult the authorized service station or provider
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