HUB 4N9742 - Caterpillar

Proper operation and maintenance are key factors in attaining the maximum service life and economy for the engine. Follow the instructions in this Operation and Maintenance Manual to minimize operating costs and maximize the service life of the engine.Note: Do not operate the engine if a misfire condition exists. Operating the engine in a misfire condition will cause engine imbalance and lead to engine and or coupling damage if not corrected.Observe the gauges frequently while the engine is operating. Record the data from the gauges in a log regularly. Compare the data to the specifications for normal engine operation. Comparing the data over time will help to detect changes in engine performance.Investigate any significant change in the gauge readings. Monitor the engine operation and act when discrepancies are found.Operating the Engine and the Driven Equipment
Check the gauges and the driven equipment frequently while the engine is operating under a load. The engine can be operated for extended periods of time at full load.Partial Load Operation
Extended operation at reduced load (less than 30%) may cause increased oil consumption and carbon buildup in the cylinders. Extended operation at reduced load may also cause fuel to slobber through the exhaust system. A loss of power and/or poor performance may result.To maintain engine efficiency and performance, apply a full load to the engine on an hourly basis. Operating the engine at a load level that is greater than 30% will also maintain engine efficiency and performance. This action will burn excess carbon from the cylinders.