CYLINDER GP-ARCH 1607610 - 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.Note: Failure to follow these guidelines can result in increased cylinder deposits and the potential for guttering of the valves. These conditions and failures are not covered by the warranty!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.