ouM hvdraulic motor that can constitute a hydraulic actuator with dliferent oil pumos. vaives and hvdrauic parts is able to adant itself to akinds of mechanical conditions by reason of some measures taken to its design. The motor has many advantages, e.g. light weight, small sizewide speed requlating range, capabl o stepping variation, relable performance and long useu lfe, etc. t has been widely applied for mineencineering, hoisting transport, metalurgy, ships, machine tools, plastics processin