LESU Pump ESC Hydraulic Oil Cylinder System for DIY 1/14 Tamiye RC Dumper Truck. LESU Pump ESC Hydraulic Oil Cylinder System 1/14 RC Dumper DIY Tamiye Truck Car.Working Pressure: The maximum working pressure is 25kg / cm2, regulated 20kg / cm2. F Frame Retractable Volume: 180mm. ONLY 1PC Hydraulic Oil Cylinder S. Ystem with Oil Tank, Brushless. If your item got any problem, please contact with me, we will help to solve and, we are very familiar with this product. But we can help to avoid this, please contact.