Fan gearbox oil replacement device and method for using the same

A fan gearbox oil replacement device, comprising:

• a moving box body, wherein a reversing mechanism, a filtering mechanism and an oil storage mechanism are arranged in an interior of the moving box body,
• wherein the reversing mechanism further comprises an adjusting groove, a first piston, a connecting rod, a second piston and an electric telescopic rod;
• wherein the first piston and the second piston are slidably arranged within the adjustment slot, wherein the first piston and the second piston are connected through the connecting rod, wherein the electric telescopic rod is installed on an outer wall of the adjustment groove, wherein an output end of the electric telescopic rod is connected to the second piston, wherein an oil outlet is formed in a bottom of the adjusting groove and is located below the first piston, wherein an oil inlet is formed in the bottom of the adjusting groove and is located below the second piston, wherein the oil inlet and the oil outlet cannot be opened or closed at the same time,
• wherein the filtering mechanism further comprises a filtering tank and a sedimentation tank, wherein the filtering tank is located below the oil outlet, and the sedimentation tank is located below the filtering tank, wherein the sedimentation tank is connected to the oil storage mechanism and is communicated with an interior of the filtering tank, wherein the sedimentation tank is capable of being pushed into or pushed out from the moving box body, wherein the oil storage mechanism is capable of being pushed into or pushed out from the moving box body, and the oil storage mechanism is communicated with the oil inlet.