COUPLING-INNER 2431512 - Caterpillar

Transmission, Differential and Final Drive
Cat Transmission/Drive Train Oil (TDTO)
Cat Transmission/Drive Train Oil is balanced to give maximum frictional material life in power shift transmissions and eliminate brake chatter in wet brake applications. Manual transmissions which have had the API CD/Cat TO-2 oil recommendation should now use this oil. This oil has passed the requirements for the new Caterpillar TO-4 oil specification which not only includes the frictional requirements, but also has gear wear requirements.This oil should be used for lubrication of winch, clutch plates, gears, and bearings.This oil is offered in several viscosity grades, including SAE 50, for maximum component life at high ambient temperatures and heavy duty cycles.Maximum transmission life and performance can be achieved, by using:* Cat Transmission/Drive Train Oil (TDTO)
This oil is formulated for transmissions and drive trains only, and should not be used in engines. Shortened engine life results.
Multigrade oils are currently not blended by Caterpillar for use in transmissions. Multigrade oils which use high molecular weight polymers as viscosity index improvers lose their viscosity effectiveness. This is because of permanent and temporary shear of the viscosity index improver. And therefore, multigrade oils are not recommended for transmission and drive train compartments.The Cat TO-4 specification does include a test for multigrade oil shear stability and multiviscosity oils with adequate shear stability may be available in the future.Commercial Oils
If the Cat Transmission/Drive Train Oil is not used, then commercial oils meeting the Caterpillar TO-4 specification should be used:* TO-4 Specification Oils Failure to follow this recommendation can cause shortened transmission life due to material incompatibility, inadequate frictional requirements for disk materials, and/or excessive gear wear.Hydraulic Oil
Cat Hydraulic Oil (HYDO)
Cat Hydraulic Oil is formulated with a balanced additive system, including detergents, rust inhibitors, antiwear agents, and defoamers. It offers maximum protection against mechanical wear, rusting, and corrosive wear in all hydraulic and hydrostatic transmission systems.Cat Hydraulic Oil should be used to achieve maximum life and performance from hydraulic system components and hydrostatic transmissions. Use of Cat Hydraulic Oil is recommended in most hydraulic and hydrostatic systems.* Cat Hydraulic Oil (HYDO)If higher viscosities are required because of high ambient temperatures, the following Caterpillar oils can be used:* Cat Diesel Engine Oil DEO (CF-4)* Cat Diesel Engine Oil DEO (CD)* Cat Transmission/Drive Train Oil (TDTO)Hydraulic and Steering Systems
Caterpillar has released a new oil product that meets the requirements for the combined steering and implement system on Challenger tractors. This oil type is widely used in agricultural tractors.This oil is called Cat MTO and it is multigrade oil with a much better ambient temperature range than the SAE 10W hydraulic oil. The temperature limits are -25°C to +40°C (-13°F to +104°F), and it has higher viscosity at the higher temperature than the SAE 10W oil.This oil is not the same as Cat TO-4 oil nor any of the engine or hydraulic oils. It is a special performance oil to be used for only those applications for which it is specified.Biodegradable Hydraulic Oil (BIO HYDO)
Caterpillar now has available a biodegradable