The plastic barrel can select the fixed pump oil supply system of the oil pump capacity according to the fast-forward speed. When the work is stopped, the oil pump cannot be unloaded. The entire flow of the pump will overflow under high pressure, and the overflow loss will generate heat, resulting in temperature rise The reason why the temperature is too high in the plastic bucket is that the volume of the plastic tank fuel tank is too small, the heat dissipation area is not enough, and the capacity of the cooling device is too small. The high temperature of the climate and operating environment causes the oil temperature to rise. The viscosity of the selected oil is inappropriate, the viscosity is large, the viscosity resistance is large, and the viscosity is too small, the leakage increases, and both cases can cause a heating temperature rise. The piping of the plastic bucket system is too thin and too long, too much bending, local pressure loss and pressure loss along the way. Insufficient component accuracy and poor assembly quality will cause most of the excess flow to overflow from the relief valve under high pressure to generate heat during operation.
In the system, the unloading circuit is faulty or because there is no unloading circuit, the mechanical friction loss between relative movement is large. The fitting clearance of the fitting is too small.