3054, 3054B and 3056 Marine Engines Caterpillar

Caterpillar Transmission/Drive Train Oil (TDTO) is balanced in order to give maximum frictional material service life in Caterpillar transmissions. TDTO exceeds the requirements for the Caterpillar TO-4 oil specification which includes the frictional requirements and gear wear requirements. TDTO is offered in different lubricant viscosity grades for maximum service life of components at high ambient temperatures and heavy duty cycles.

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

Table 1

Caterpillar TDTO Lubricant Viscosities For Operating Temperatures
Cooling of Transmission	Oil Viscosities	Minimum Temperature	Maximum 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.

Show/hide table

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

Show/hide table

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.