Operation and Maintenance Manual SC9DF Electronically Controlled Diesel Engine for Agricultural Equipment
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plug(s) missing
The oil is diluted by coolant Find out the reason of dilution and replace the oil and oil filter
The oil pressure control valve has failure Check/replace the pressure control valve
The oil pressure gauge has failure Check the oil pressure gauge
The oil filter is clogged Check/replace the oil filter
Engine parts such as shaft, bearing,
bushing become worn
Replace the worn part(s)
5.8 Engine is overheating
Possible causes Correction
Coolant is insufficient
Check the cooling system for leakage, add coolant and discharge air
completely
The radiator pressure cap has failure Check the radiator cap
The engine is overloaded Reduce load
The radiator is covered with excessive
dust
Check the radiator and clean it if necessary
The wind guide ring of the radiator is
damaged, or separated
Check the wind guide ring and repair or replace it if necessary
The fan drive belt is damaged or loose Check the belt tension and tensioner
The water pump is breakdown Repair the pump
Air or combustion gas enters the cooling
system
Check the water lines for leakage and looseness
The coolant temperature sensor or
thermometer is damaged
Check the coolant temperature sensor and thermometer
The thermostat has faults Replace the thermostat
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