... CAT 3306 diesel engine)Type water cooled, single line, vertical, four strokes, turbocharged, 6-cylinders, diameter 140mm or 121mm ... part. It is very convenient to service. Transmission is multi-stage planetary gear drive to realize modular assembling and disassembling. ... service.Hydraulic system of the machineIt is composed of oil pump, transmission control valve, steering and braking control valve, ...