The hydraulic reservoir is a container for holding the fluid required to supply the system, including a reserve to cover any losses from minor leakage and evaporation. The reservoir can be designed to provide space for fluid expansion, permit air entrained in the fluid to escape, and to help cool the fluids
(1) Main function of “oil reservoir ” is to store sufficient amount of hydraulic oil in the system.
(2) Apart from this, it has other important functions such as:
To cool the hot return oil.
To settle down the contaminants.
To remove air bubble.
To separate water from the oil.