The part number for the travel final drive in the Caterpillar 303E CR is 442-5655.
The travel final drive contains a planetary reduction gearbox that helps to reduce the speed of the hydraulic motor and increase the torque output.
The Caterpillar 303E CR has two track motors and therefore two travel final drives.
The travel final drives are designed to provide power to the tracks and allow the machine to move forward and backward.
The Caterpillar 303E CR has a maximum travel speed of 3.3 miles per hour (5.3 kilometers per hour).