SEAL 3Q7797 - 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 messenger display, or the Cat Electronic Technician (ET) frequently while the engine is operating. Record the data from the messenger display or the Cat ET in a log. Record all Cat ET data from the status screens. Record the time and the date for each event or each diagnostic. Include the parameters that are listed in Table 1. Average the data that is recorded during operation and record the average values for each day. Compare the data to the specifications for normal engine operation. Comparing the data over time will help to detect trends in engine performance.
Table 1
Engine Performance
Operator Date
Engine serial number Hour meter
Load RPM
Coolant temperature Oil pressure
Oil filter
differential pressure Air filter
differential pressure
Inlet
manifold pressure Inlet
manifold temperature
Exhaust
temperatures Exhaust
pressure
Secondary transformer voltages Exhaust emissions
Throttle position Fuel valve position Investigate any significant change in the gauge or in the Cat ET readings. Monitor the engine operation and follow recommendations when discrepancies are found.Operating the Engine and the Driven Equipment
Check the messenger display or ET and the driven equipment frequently while the engine is operating under a load. The engine can be operated continuously 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:
Narrow margin for detonation
Power loss
Poor performance
Accelerated wear of componentsCat Engines can be operated at light loads for limited times with no harmful effects. Table 2 lists the limits for hours of operation at various loads.After the time limit for reduced load operation has expired, operate the engine for a minimum of 2 hours at a load that is more than 70 percent of the rated load.For example, an engine is operating at 20 percent of the rated load. 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 2 hours at a load factor of more than 70 percent.To help keep engine maintenance at a minimum, follow the guidelines that are listed in Table 2.
Table 2
Time Limits For Low Load Operation
Engine Load Time Limit
0 to 30 percent 1/2 hour
31 to 50 percent 2 hours
51 to 100 percent Continuous (1)
(1) For continuous operation, the manifold air pressure must be greater than the atmospheric pressure.