LOCKNUT 3E9860 - 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 in order to minimize operating costs and maximize the service life of the engine.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 take action 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 low idle or at a reduced load will cause increased oil consumption and carbon buildup in the cylinders. Carbon buildup results in the following effects:
Power loss
Poor performance
Accelerated wear of componentsCaterpillar Engines can be operated at very light loads (torques) for limited times with no harmful effects. Table 1 lists the limits for hours of operation at various torques.After the time limit for reduced load operation has expired, operate the engine for a minimum of two hours at a torque that is more than 70 percent.For example, an engine is operating at 20 percent of the rated torque. The engine may be operated at this load factor for a maximum of one-half hour. After the one-half hour, operate this engine for at least two hours at a load factor of more than 70 percent.To keep engine maintenance at a minimum, follow the guidelines that are listed in Table 1.
Table 1
Time Limits For Low Load Operation
Engine Torque NA Engines TA Engines
0 to 30% 1/2 hour 1/2 hour
31 to 60% 2 hours 2 hours
61 to 70% 24 hours Continuous(1)
71 to 100% Continuous Continuous(1)
(1) For continuous operation of TA engines, the manifold air pressure should be greater than the atmospheric pressure.