LESU Flatbed Roll on/off Trailer for Tamiya RC 1/14 Dump Tractor Truck Vehicle. ※LESU 1/14 8x8 RC Roll on/off Hydraulic Truck Crane Dumper Tipper Reversing Valve. 1/14 LESU RC 8 8 Dumper Truck. The maximum working pressure of the oil pump is 25kg/cm2, the rated working pressure is about 20kg/cm2, and the flow is 100ml/min.