The main reason why the hydraulic pump temperature is too high

① The volume of the fuel tank is too small and the heat dissipation area is not enough; the oil cooling device is not installed, or the capacity of the cooling device is too small.

② For a quantitative pump oil supply system that selects the oil pump capacity according to the fast forward speed, during operation, most of the excess flow will overflow from the relief valve under high pressure and generate heat.

③ If the unloading circuit in the system fails or the unloading circuit is not set up, the oil pump cannot unload when it stops working. The entire flow of the pump overflows under high pressure, causing overflow loss and heating, resulting in temperature rise.

④ The system pipeline is too thin, too long, and has too many bends, resulting in large local pressure losses and large pressure losses along the way.

⑤ The components have insufficient precision and poor assembly quality, and the mechanical friction loss between relative movements is large.

⑥ The fitting clearance of the matching parts is too small, or the clearance is too large after use and wear, resulting in large internal and external leakage, resulting in large volume loss. If the volumetric efficiency of the pump decreases, the temperature will rise quickly.

⑦ The working pressure of the hydraulic system is adjusted to be much higher than actual needs. Sometimes it is because the seal is too tight, or the seal is damaged or leakage increases, and the pressure has to be increased to work.

⑧ The climate and working environment temperature are high, causing the oil temperature to rise.

⑨ The viscosity of the oil is improperly selected. If the viscosity is large, the viscosity resistance will be large. If the viscosity is too small, leakage will increase. Both situations can cause heating and temperature rise.