What causes the hydraulic oil to overheat during operation of a four-column hydraulic press?

1) The volume of the fuel tank is too small, the heat dissipation area is not enough, the oil cooling device is not installed, or although there is a cooling device, its capacity is too small.
2) For a quantitative pump oil supply system that selects the oil pump capacity according to the fast forward speed, most of the excess flow will overflow from the relief valve under high pressure during operation 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, causing the oil to heat up.
4) The system pipeline is too thin and too long, with 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 losses. For example, the volumetric efficiency of the pump is reduced and the pump heats up quickly.
7) The working pressure of the hydraulic system is adjusted to be 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 viscous resistance will be large. If the viscosity is too small, the leakage will increase. Both situations can cause the oil to heat up.