TORQUE CONVERTER MOUNTING GROUP 3L1521 - Caterpillar

Table 1
System Oil Type Hour Minimum Hour Maximum
Transmission and Torque Converter TDTO 1000 2000
Hoist and Brake Cooling TDTO 4000 6000
Steering HYDO Advanced fluids 4000 6000
Differential and Final Drive FDAO 4000 6000 The oil change internal can be extended to the maximum hour interval listed in Table 1 if the following conditions are met:
Use of recommend oil type or use of an oil that meets the Caterpillar Oil Specification - Refer to Operation and Maintenance Manual, SEBU6250, "Lubricant Information".
Use Caterpillar filters. Follow the recommendations of particle count for management of differential/final drive oil in Off-Highway Trucks. Monitor the cleanliness of the system by the trend of particle count analysis of the oil. Corrective action must be taken to return the system to the concentration that is desired.
Monitor the S.O.S samples consistently according to the Operation and Maintenance Manual guidelines.Monitoring S.O.S Samples
Begin with more frequent sampling intervals to optimize oil changes. When extending oil change intervals, samples should be taken more frequently when establishing the base line interval. Oil samples should be closely evaluated for the following conditions:
Iron (Fe)
Copper (Cu)
Silicon (Si)
Lead (Pb)
Oxidation
Particle CountIf the initial oil samples do not indicate problems, with wear, soot, or oxidation, the oil change can be extended beyond the published service interval. Evaluate the oil changes for three more service intervals.Extending oil drains by monitoring your oil trends is a safe way to optimize the oil change for machines. A safe stopping point is to use the global Cat Wear Tables. The Wear Tables have three categories for wear elements:
"No action required"
"Monitor Compartment"
"Action required"Consistent maintenance practices are always important to component durability. Poor maintenance schedules may lead to over extended oil life and abnormal wear in components.S.O.S Services interpreters can find additional information on optimizing oil change intervals at the S.O.S Services Knowledge Network site.The maintenance interval chart in the Operation and Maintenance Manual is the recommended maximum service interval. However, more frequent oil change intervals may be required for certain applications.Applications that may require more frequent oil change intervals include the following:
Severe operating conditions
Excessive torque converter outlet temperatureUse frequent S.O.S sampling and visual inspections to determine optimal oil change intervals. For additional information on S.O.S sampling reference the documentation that was previously mentioned.Note: Before changing the axle oil, be sure to inspect the magnetic plugs and clean the magnetic plugs on the differential and on the two final drives.