If the temperature of the hydraulic oil becomes too hot, many different problems can arise. In order to prevent these problems, when the temperature exceeds a set point, the fluid is cooled by the oil cooler.

Examples of Problems Caused by High Temperature

The precision of hydraulic operations ins diminished due to oil leakage in the control valves and actuators.

1) Internal leakage in hydraulic devices (especially pumps and motors) increases, and volume efficiency is diminished.

2)Sealing materials used in the packing and oil seals can change their properties.

3)The hydraulic oil will degenerate more quickly.

In case of operation in a hot climate or continuous operation for a long time, the oil cooler prevents temperature increase and mitigating power loss.
An air-cooled oil cooler is used in hydraulic System.

Generally, the maximum permissible temperature for hydraulic oil is 80C°. When equipment is used in tropical areas, appropriate hydraulic oil must be chosen.

If the temperature of the hydraulic oil gets too high, the packing can also be adversely affected.