Inter-wheel differential switch for Terex ATT400-3

The inter-wheel differential switch, part number S-65416-76, serves as the control interface for the differential locking mechanism within the drivetrain of heavy machinery. By activating this switch, the operator forces the differential to lock, ensuring that power is distributed equally to both wheels on an axle. This action prevents a single wheel from spinning freely when it loses contact with the ground or encounters low-friction surfaces, thereby maintaining forward momentum and stability during operation in challenging environments.

This component is designed for use in the Terex ATT400-3 crane. It integrates into the electrical control system to provide the operator with the ability to manage traction settings based on the specific ground conditions encountered at the job site. Proper function of this switch is necessary to ensure the drivetrain responds correctly when the operator requires additional grip for maneuvering the crane across loose or slippery surfaces.

Differential switches function by completing or breaking the electrical circuit that triggers the pneumatic or hydraulic locking mechanism inside the axle housing. When engaged, the mechanism physically links the axle shafts, forcing them to rotate at the same speed regardless of the resistance at each individual wheel. This system is a standard feature in mobile cranes to assist with mobility on construction sites and off-road terrain.