DISC 4B7751 4A0522 - Caterpillar

Selection of the Oil Change Interval
A 500 hour engine oil change interval is available, provided that the operating conditions and recommended multigrade oil types are met. When these requirements are not met, shorten the oil change interval to 250 hours, or use an S O S Services oil sampling and analysis program to determine an acceptable oil change interval.If you select an interval for oil and filter change that is too long, you may damage the engine.
The normal engine oil change interval is listed in this Operation and Maintenance Manual, "Maintenance Interval Schedule".Abnormally harsh operating cycles or harsh environments can shorten the service life of the engine oil. Arctic temperatures, corrosive environments, or extremely dusty conditions may require a reduction in engine oil change intervals. Also refer to Special Publication, SEBU5898, "Cold Weather Recommendations for All Caterpillar Machines". Poor maintenance of air filters or of fuel filters requires reduced oil change intervals. Consult your Caterpillar dealer for more information if this product will experience abnormally harsh operating cycles or harsh environments.Adjustment of the Oil Change Interval
Note: Your Caterpillar dealer has additional information on these programs.Cat oil filters are recommended.Program A
Verification for an Oil Change Interval of 500 HoursThis program consists of three oil change intervals of 500 hours. Oil sampling and analysis are done at 250 hours and 500 hours for each of the three intervals for a total of six oil samples. The analysis includes oil viscosity and infrared (IR) analysis of the oil. If all of the results are satisfactory, the 500 hour oil change interval is acceptable for the machine in that application. Repeat Program A if you change the application of the machine.If a sample does not pass the oil analysis, take one of these actions:
Shorten the oil change interval to 250 hours.
Proceed to Program B.
Change to a preferred oil type in the “Lubricant Viscosities for Ambient Temperatures” Table in this Operation and Maintenance ManualProgram B
Optimizing Oil Change IntervalsBegin with a 250 hour oil change interval. The oil change intervals are adjusted by increments. Each increment is an additional 50 hours. Periodic oil sampling and analysis are done during each interval. The analysis includes oil viscosity and infrared (IR) analysis of the oil. Repeat Program B if you change the application of the machine.If an oil sample does not pass the analysis, shorten the oil change interval, or change to a preferred multigrade oil type in the listing above.References
Reference: Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations"Reference: Special Publication, SEBU5898, "Cold Weather Recommendations for All Caterpillar Machines"Reference: Special Publication, PEDP7035, "Optimizing Oil Change Intervals"Reference: Special Publication, PEDP7036, "S O S Fluid Analysis"Reference: Special Publication, PEDP7076, "Understanding the S O S Oil Analysis Tests"Procedure for Changing the Engine Oil and Filter
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer