The steering column assembly also called steering shaft assembly. The steering shaft assembly height is 697mm, and the height can be changed, it can tilting up and tilting down. The steering wheel diameter 380mm,the steering shaft assembly shroud is plastic injection moulding. The steering shaft assembly had mounted wire harness, the rocker switch, left combination switch, ignition switch,and instrument cluster to show the status of the machine. This steering shaft assembly is ergonomically designed for the construction, agricultural,mining machines.