13 Maintenance Section Lubricant Specifications

For maximum transmission service life and performance, Caterpillar recommends Caterpillar Transmission/Drive Train Oil (TDTO).

Table 5

Caterpillar TDTO

Lubricant Viscosities For Operating Temperatures

Cooling of

Oil Viscosities

Minimum

Maximum

Transmission

Temperature

Temperature

 

 

 

 

 

Raw/Seawater

SAE 30

15 ￿C (5 ￿F)

80 ￿C (176 ￿F)

 

 

 

SAE 50

5 ￿C (23 ￿F)

95 ￿C (203 ￿F)

 

 

 

 

 

Jacket Water

SAE 50

5 ￿C (23 ￿F)

95 ￿C (203 ￿F)

 

 

 

 

Contact your Caterpillar dealer for part numbers and for sizes of available containers.

NOTICE

This oil is formulated for transmissions and drive trains only, and should not be used in engines. Shortened engine life will result.

NOTICE

Caterpillar Gear Oil (GO) is not the same as Caterpillar Transmission/Drive Train Oil, and does not meet Caterpillar’s specifications for TO-4 oil. Caterpillar GO or commercial gear oils should not be used in compartments which specify TO-4 oil.

Caterpillar Transmission/Drive Train Oils

If Caterpillar Transmission/Drive Train Oil is not used, commercial oils meeting the Caterpillar TO-4 specification must be used in Caterpillar marine transmissions. Use TO-4 Specification Oils that are single grade only.

Commercial Marine Transmissions

For marine transmissions which are not manufactured by Caterpillar, refer to the lubrication recommendation of the OEM for the marine transmission or the vessel.

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Synthetic Base Stock Oils

SMCS Code: 1300; 1348; 7581

Synthetic base oils are acceptable for use in Caterpillar engines if these oils meet the performance requirements that are specified for the engine compartment.

Synthetic base oils generally perform better than conventional oils in the following two areas:

Synthetic base oils have improved flow at low temperatures especially in arctic conditions.

Synthetic base oils have improved oxidation stability especially at high operating temperatures.

Some synthetic base oils have performance characteristics that enhance the service life of the oil. However, Caterpillar does not recommend the automatic extension of oil change intervals for any type of oil. Oil change intervals for Caterpillar engines can only be adjusted after an oil analysis program that contains the following tests: oil condition and wear metal analysis (Caterpillar’s S·O·S oil analysis), trend analysis, fuel consumption, and oil consumption.

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Re-refined Base Stock Oils

SMCS Code: 1300; 1348; 7581

Re-refined base stock oils are acceptable for use in Caterpillar engines if these oils meet the performance requirements that are specified by Caterpillar. Re-refined base stock oils can be used exclusively in finished oil or in a combination with new base stock oils. The US military specifications and the specifications of other heavy equipment manufacturers also allow the use of re-refined base stock oils that meet the same criteria.

The process that is used to make re-refined base stock oil should adequately remove all wear metals that are in the used oil and all additives that are in the used oil. The process that is used to make re-refined base stock oil generally involves the processes of vacuum distillation and hydrotreating the used oil. Filtering is inadequate for the production of high quality re-refined base stock oils from used oil.