The volume of the fuel tank of the plastic barrel is too small, the heat dissipation area is not enough, and the capacity of the cooling assembly is too small. The temperature of the climate and working environment is high, causing the oil temperature to rise. If the viscosity of the oil is improperly selected, the viscosity is large, the viscous resistance is large, and the viscosity is too small, the leakage will increase, and both cases can cause heat and temperature rise. The piping of the plastic barrel system is too long and bends too much, and the local pressure loss and the pressure loss along the way are large. Insufficient component accuracy and poor device quality, and large mechanical friction loss between relative activities. The matching clearance of the matching parts is too small, or the clearance is too large after use and wear, and the internal and external leakage is large, resulting in a large volume loss. For example, the volume of the pump is reduced, and the temperature rises quickly. The plastic barrel selects the fixed pump oil supply system of the oil pump capacity according to the fast forward speed. During work, most of the excess flow will overflow from the overflow valve under high pressure and generate heat. The unloading circuit in the system fails or because the unloading circuit is not set, the oil pump cannot be unloaded when the stop is working. The entire flow of the pump overflows under high pressure, resulting in overflow loss and heat generation, resulting in temperature rise.
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