... C6121ZLG10 (Licensed CAT 3306 diesel engine)Type water cooled, single line, vertical, four strokes, turbocharged, 6-cylinders, diameter 140mm ... service.Hydraulic system of the machineIt is composed of oil pump, transmission control valve, steering and braking control valve ... . It mainly consists of oil pump, cylinder, inlet valve group diverter valve group, oil tank line and controlling parts.Main pump ...