Operation and Maintenance Manual SC9DF Electronically Controlled Diesel Engine for Agricultural Equipment
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running-in condition and change its oil thereafter so as to improve its moving parts working condition and its reliability
and service life.
The way of running-in varies from one engine application and loading manner to another. In principle, engine speed
and load in running-in process will be increased gradually with the running-in going on. Load should be 50%-80% of
its full load, and speed should not exceed 80% of its rated speed.
Do not run the engine at idle or with low load for a long-time either in running-in period or normal working period
thereafter. Continuous running at idle should not exceed 10 minutes to avoid early engine wear due to carbon deposit
or engine performance degeneration.
3.2.2 Normal operation
Continuous full- accelerator running at a speed lower than maximum torque speed shall not longer than 1 min.
Check oil pressure and coolant temperature frequently during engine operation and see Chapter II "Main
Specifications and Parameters" for details. If the running-in conditions are not met, stop the engine for check, or
repair it if necessary.
△Caution: The engine will be damaged in case of continuous operation when the coolant temperature is
lower than 60℃ or higher than 100℃.
In the case of too high temperature of coolant, decrease the engine speed or change to the lower gear or both
until the temperature recovers to the range of normal working conditions, otherwise, find the cause and trouble
shoot the problems as specified in Chapter V "Troubleshooting Guidelines".
Most failures will develop with a symptom. Observe the change of engine performance and sound of abnormality,
or check if one of following signs occurs. If so, it is necessary to repair it.
－misfire
－abnormal smoke
－abnormal vibration
－power loss
－abnormal noise
－oil consumption increases
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