Hydraulic oil is the main source of power for small cranes. It plays a role in energy transmission, anti-wear, system lubrication, anti-corrosion, anti-rust, and cooling in the hydraulic system. If the hydraulic oil is used for a long time, it needs to be replaced in time. When replacing it, it is not only necessary to fill the tank with oil, but also to clean up many old hydraulic oil remaining in the cylinder and hydraulic control valve. Because the old and new hydraulic oil in the hydraulic tank are mixed, this will Speed up the deterioration of new oil. So do you know how to properly change the hydraulic oil of the small crane, let's understand it together:

First release the hydraulic oil in the hydraulic oil tank, clean the oil tank and add new hydraulic oil, then disassemble the hydraulic oil circuit main pipe, start the engine at low speed, make the oil pump work, operate each mechanism separately, and then disassemble the oil return pipe of each working oil cylinder The road depends on the hydraulic oil to drain out the old oil in the circuit one by one until new oil flows out of the oil return main pipe. Finally, connect the oil return main pipe to the oil tank and add new hydraulic oil to the oil tank of the small crane to the specified position.