Engine:Cummins 6BTAA5.9-C Hydraulic pump: Gross power adjustment + variable power + negative flow control SW230 ExcavatorEngine here working mode, high power H, standard power S, low power L t.The design of each mode match their speed and system flow , the electronic control system provides highest efficiency and least consumption.Engine:Cummins 6BTAA5.9-C Hydraulic pump Gross power adjustment + ...