Where does the electric fan not turn to refuel?

After confirming that the motor is in good condition, refuel as shown below.

Oil or lathe oil can be added to the oil-bearing parts of the front and rear end covers, and butter (grease oil) can be added to the gear box. When refueling the rear end cover, it is necessary to take out the three screws of the gear box first, and then take out the gear box to refuel, because the refueling place at the rear shaft end is blocked by the gear box, so it is difficult to refuel. If the capacitor wire is not long enough, you can remove the capacitor and refuel.

After refueling, rotate the motor shaft by hand until the motor shaft rotates flexibly.