Change hydraulic oil
It is recommended to change hydraulic oil to 750 operation hours or one year depending on what occurs first.
First, remove the filler cap and then loosen the two cap screws, both at the bottom of the tank, with an Allen key. Once you have drained all the oil, place the screws back.

If you detect that oil presents a dark color, foam or particles, you must change oil and oil filter immediately. This can produce a fail in the unit.
Pay attention characteristics of oils and in case of doubt contact the manufacturer.