450J - DOZER, CRAWLER 0375 Automatic Control Circuits Hydraulic Control Unit For full view, you need register Parts on group Hydraulic Control Unit: Pos. Part No Qty Parts name Comments 1. 19M7797 [2] Screw M6 X 40 2. AT375187 [1] Electrohydraulic Controller (SUB FOR AT320767, AT347731 AND AT365004)