Sampling Port for the Engine Oil
Sampling Port for the Hydraulic Oil
Sampling Port for the Hydrostatic Drive Oil
Sampling Port for the Differential and Final Drive Oil
|Compartment    ||Recommended Oil Change Interval    ||Recommended Sampling Interval    ||Sampling Valve    ||Oil Type    |
|Engine    ||500 Hours    ||250 Hours    ||Yes    ||DEO    |
|Hydraulics    ||1000 Hours    ||500 Hours    ||Yes    ||HYDO    |
|Hydrostatic Drive Box    ||2000 Hours    ||500 Hours    ||No    ||TDTO    |
|Differential and Final Drive    ||2000 Hours    ||500 Hours    ||No    ||TDTO    |
Consult your Caterpillar dealer for complete information and assistance in establishing an S·O·S program for your equipment.
More Frequent S·O·S Sampling Improves Life Cycle Management
Traditionally, the suggested S·O·S sampling intervals have been at each oil change, 250 hours for engines, or every 500 hours for all other compartments. However, a sampling interval of 250 hours for all compartments is recommended.
Studies have revealed, that in some high load applications and high temperature applications, 500 hours between oil samples is too long a time interval to predict potential failure modes. A 250 hour sampling interval provides more data points between oil change intervals thus increasing the odds for detecting a potential failure.
Determining Optimal Oil Change Intervals
Sampling compartments every 250 hours also provides oil condition/performance information to ascertain the optimal utility of a particular oil. Also, more data points enable close monitoring of component wear rates while obtaining maximum lubrication utility. For detailed information on extending oil change intervals, please contact your Caterpillar dealer.
Optimizing Component Life Cycle
An increased sampling frequency also provides better defined data trends from one oil change interval to the next. This enables close monitoring of component life cycle wear patterns to assure full component life cycle is realized.
In summary, the standard S·O·S oil sampling interval for all engines remains at 250 hours. While 500 hour oil sample intervals remain acceptable for non-engine compartments, they are not necessarily optimal. Under the above conditions, 250 hour oil sampling intervals are recommended.