slide out fluid
When should the fluid be changed and what is recommended?
Forum Discussion
pigman1 wrote:
Hydraulic fluid is hygroscopic. Means it absorbs water from the air. Some can absorb enough water that the steel parts in contact with it start to rust. Ergo, why you change it periodically.
Not all hydraulic fluids are hydroscopic. True petroleum based oils are not. Even transmission fluid is not hydroscopic. The water comes from head space in the reservoir and temperature changes which causes condensation to form on cooler surfaces. If you get a cap for your reservoir that prevents moisture from entering, you won't have a water problem.
