Hydraulic fluids

Maintenance related articles:
Hydraulic equipment maintenance - why it's so important
Hydraulic system oil types and manufacturers' recommendations
Hydraulic fluid - getting the viscosity right
High hydraulic fluid temperature - how it causes premature failures
Which hydraulic oil should I use?
Biodegradable hydraulic fluid - its application and use
Adding hydraulic oil - without the dirt
The true cost of hydraulic oil leaks
Hydraulic pump life cut short by fluid contamination
Controlling hydraulic fluid decompression in press circuits
Dealing with water in hydraulic fluid
Flushing hydraulic systems
If you have to change your hydraulic oil - then do this ...

Application guidelines and formulas:
When selecting a hydraulic fluid for a particular application a number of properties may need to be considered. The most important of these properties is typically kinematic viscosity. The following document contains practical information on viscosity and bulk modulus, including a temperature/viscosity diagram for ISO hydraulic oils; and a formula for calculating compressibility of hydrocarbon based fluids.

Download document