Parts list: № Number Qty Name Options 1 PF90311 1 Steering System 2 PF90670 1 Steering System Next page: ST808883 Attachment, AutoTrac™ Tractor Kit, Roof Harness, 6040 Closed Roof ST73177 AutoTrac™ Tractor Kit, Electro Hydraulic Steering Control Unit (Steering Valve),7630, 7730, 7830, 7930 ST751076 Attachment, AutoTrac™ Tractor Kit, 9X00T (PIN -902000) ST73264 AutoTrac™ Tractor Kit, Wheel Angle Sensor, 8130, 8230, 8330, 8430, 8530 ST807255 Attachment, AutoTrac™ Tractor Kit, King Pin, 6105R, 6115R, 6125R, 6130R ST73368 AutoTrac™ SSU Jumper Harness, Large Frame 7020, 8000, 8000 Ten, 8020 Wheel, Revised Forward Speed, Reverse Functionality (Circles Compatible) ST808884 Attachment, AutoTrac™ Tractor Kit, Steering System, 6170R, 6190R, 6210R Models ST73270 AutoTrac™ Tractor Kit, Chassis Harness, 8130, 8230, 8330, 8430, 8530 ST73180 AutoTrac™ Tractor Kit, Steering Pivot Assembly Components, 7630, 7730, 7830, 7930 ST73165 AutoTrac™ Tractor Kit, Steering Control Valve to Tractor Brake W/ Trailer Brake and Suspended Front Axle, 7220, 7320, 7420, 7520