Yes. That reservoir is not meant to be topped off all the way - there needs to be space for expansion, and the heated fluid will expand.
Then you'll have excessive hydraulic pressure, and could damage the hydraulic system.
Hydraulic fluid and hydraulic oil are one in the same.
Any kind of hydraulic fluid, it is all fundamentally the same.
AW 46
che tipo di fluido idraulico in bobcat 753 skid steer
fluid is called viscosity in hydraulic system
Manufacturer introduces hydraulic system hydraulic oil.
Air in the hydraulic fluid
The pump in a hydraulic system forces fluid out and that creates pressure
The output of the hydraulic system for hydraulic fluid with a "T" is displayed.
A list of Preventive Maintenance Task for a Hydraulic System could be: Change the (could be the return or pressure filter) hydraulic filter. Obtain a hydraulic fluid sample. Filter hydraulic fluid. Check hydraulic actuators. Clean the inside of a hydraulic reservoir. Clean the outside of a hydraulic reservoir.
Pressurized fluid (hydraulic oil, water or some other liquid) provides the force in a hydraulic system.