Quick Answer 456-0167 is a Caterpillar joystick base assembly — officially listed as "Base Assembly-Joystick". It is the lower body of the joystick: the part that carries the pivot, the sensors and the 6-pin DT electrical connector, turning the operator's hand movement into control signals for the machine.It is fitted across Caterpillar's D-series compact track loaders and skid steer loaders...