Loader hydraulic oil temperature is too high

[DIG-DOG]

1. Improper selection of hydraulic oil brand

Improper selection of hydraulic oil brands, especially the viscosity index of oil, will directly threaten the normal operation of the hydraulic system. Therefore, only hydraulic oils with a specific viscosity scale and viscosity changes as small as possible can be selected. When selecting hydraulic oil, the specific construction area and season should also be considered, and the hydraulic oil with lower viscosity should be selected for winter construction in northern China; Hydraulic oil with high viscosity should be selected in summer; Machines with clear oil standards should be filled with hydraulic oil in strict accordance with the regulations.

2. Improper pressure adjustment

When the pressure of the system is too high, the relief valve can not be relieved normally, resulting in internal leakage and addition, and the oil temperature of the system rises. For the hydraulic system with back pressure valve on the oil return circuit, if the pressure of the back pressure valve is too high, the oil return resistance is too high, and when the oil return filter is blocked or the oil return pipeline is aging and stratified, the back pressure will be high, and the pressure is lost when the oil flow is added, resulting in the oil temperature is too high.

3. Internal leaks

In the process of energy transfer, if the internal leakage of the loaderis serious, the volume of the system will be lost, and the lost energy will be converted into heat energy, resulting in high oil temperature of the system. If the component gap is too small, there will be a conflict between the relative moving parts, but also make the oil temperature rise; And if the distance is too large, the leak will be more serious.

4, hydraulic pump suction

The suction of the hydraulic pump in the loadermixes the oil with too much air, and under the action of high pressure, the gas erosion and hydraulic shock are delivered, accompanied by strong oscillation and noise, resulting in the rapid increase of the oil temperature of the system. Most of the causes of the suction phenomenon of hydraulic pump are formed by the obstruction of the oil filter element or the oil inlet pipe. If the tubing joint is loose or the drive shaft oil seal of the pilot pump and the main hydraulic pump is damaged, the hydraulic pump will also be sucked empty.

5, parts wear

Severe wear of the hydraulic system components of the loaderwill lead to excessive oil temperature in the system. Many parts of the system are sealed through voids. Once these hydraulic components wear, they will form an internal leakage addition, resulting in higher oil temperature, lower oil viscosity, which will lead to further addition of internal leakage, resulting in a further increase in oil temperature, a vicious cycle.

6, the heat dissipation is not good

Too much dirt deposited on the surface of the radiator will form poor heat dissipation and ventilation, resulting in high oil temperature; The low level in the hydraulic tank causes insufficient oil to circulate in the system, which also leads to high oil temperature in the system.

7. The hydraulic components are too tight

Conflicts caused by overtight hydraulic components can also cause the oil temperature to rise.

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