4.Return Filter Restriction Detected

7.Hydraulic Oil

Hydraulic oil is essential for transmission of the drive force and lubrication of the hydraulic equipment parts. Improper selection or handling of the hydraulic oil may cause a problem, such as "expected performance of the hydraulic equipment cannot be achieved" or "the hydraulic equipment life is extremely shortened." Therefore, it is important to fully understand the following before selecting and handling the hydraulic oil.

[1]Required properties for the hydraulic oil

Hydraulic oil is used for drive force transmission and hydraulic equipment lubrication. In addition, it has a life.

From these points, the following properties are required for the hydraulic oil:

(1)Drive force transmission (a) A viscosity appropriate for the hydraulic equipment and low viscosity change with temperature. (b) Good antifoam properties. (c) High ignition point. (d) Compatible with the packing and seal material. (2)Hydraulic equipment lubrication (a) Good lubrication even when operational conditions, such as temperature and pressure, vary. (b) Good antirust properties. (c) Good water and contaminant separation. (3)Hydraulic oil life (a) Chemically stable. (b) Good oxidation stability and less deterioration after long use. (4)Others (a) Transparent color.

Select hydraulic oil that meets the requirements above.