WINDOW-DOOR 3153750 - Caterpillar

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.