BELT-SERPENTINE 2831171 - Caterpillar

Table 1
Compartment Recommended Sampling Interval Sampling Valve Oil Type
Engine 250 Hours Yes Cat DEO
Cat DEO-ULS
Transmission 500 Hours Yes Cat TDTO
Cat TDTO-TMS
Hydraulics 500 Hours Yes Cat HYDO Advanced
Differential and Final Drive 500 Hours No Cat TDTO
Cat FDAO Consult your Caterpillar dealer for complete information and assistance in establishing an S O S Services program for your equipment.More Frequent S O S Sampling Improves Life Cycle Management
Traditionally, S O S sampling intervals have been at 250 hours for engines and at 500 hours for all other compartments. However in severe service applications, more frequent oil sampling is recommended. Severe service for lubricated compartments occurs at high loads, in high temperatures, and in dusty conditions. If any of these conditions exist, sample the engine oil at 125 hour intervals and sample the other compartments at 250 hour intervals. These additional samples will increase the chance of detecting a potential failure.Determining Optimum Oil Change Intervals
Sampling the oils per the recommendations given in Table 1 provides information for oil condition and for oil performance. This information is used to determine the optimum usable life of a particular oil. Also, more points of data will allow closer monitoring of component wear rates. Close monitoring by a trained analyst also allows you to obtain the maximum use of the oil. For detailed information on optimizing oil change intervals, consult your Cat dealer.This Special Publication does not address recommended oil drain intervals, but rather provides guidance that should be used with your specific engine/machine Operation and Maintenance Manuals in determining acceptable oil drain intervals. Consult your engine/machine Operation and Maintenance Manuals, and consult your Caterpillar dealer for additional guidance, including but not limited to guidance on establishing optimized and/or acceptable oil drain intervals.To reduce the potential risk of failures associated with extended oil drain periods, Caterpillar recommends that oil drain intervals only be extended based on oil analysis, and subsequent system inspections. Oil analysis alone does not provide an indication of the rate of formation of lacquer, varnish and/or other deposits on surfaces. The only accurate way to evaluate specific oil performance in a specific system using extended oil drain periods is to observe the effects on the system components. Making these observations involves tear-down inspections of systems that have run to the normal overhaul period while using extended oil drain intervals. Following this recommendation will help ensure that excessive component wear does not take place in a given application.Note: The use of Cat S O S Services oil analysis helps environmental sustainability as the best way to optimize oil life, reduce waste, and will help engines reach the expected life. Consult your Cat dealer regarding the testing required to establish a safe, optimized oil drain interval.Standard oil drain intervals as published in the engine Operation and Maintenance Manuals are for typical applications:
Using recommended oils
Using good fuel
Using recommended filters
Using industry standard good maintenance practices
Following maintenance intervals as published in the engine Operation and Maintenance ManualsMore severe applications may require shortened oil drain intervals, while less severe