oil cooler return valve

[auy_tong2]

after oil cooler return check valve? what is the use? can i remove this for hot countries?thanks

 

[Diesel Dave]

On a Hitachi / Deere ?
From a Deere “D“ series excavator manual .
“The restriction valve is used in the return line after the hydraulic oil cooler to create some back pressure in the return passage of control valve. The back pressure ensures a flow of makeup oil to keep the swing motor case full of oil and a flow of oil through the anticavitation valves to prevent cylinder cavitation.”

 

[henry.45]

The restriction valve in a Deere "D" series excavator is important for the hydraulic system. It creates back pressure after the oil cooler, which helps keep the swing motor case full of oil and prevents cylinder cavitation. This is achieved by ensuring a flow of makeup oil and oil through the anticavitation valves

 

[auy_tong2]

yes hitachi thanks for your reply