"24V DC Cooling Fan" on one side of the center of the face of the heat sink local, first fan from the heatsink removed, usually by a circular sticker paper stick, thrown off the adhesive paper, the center of the circle fans holes on exposed.
The need to remove the clip, the central bearing on the card with a small "C" shaped plastic card. Otherwise, the motor rotor (with fan) can not removed, this little clip can be combined with two sharp things removed. Be sure to take good care of it, do not lose it.
Single-handedly hold "24V DC Cooling Fan" fan, then, one hand holding the fan skeleton pull back, so you can put the motor stator and rotor separated. First look at the stator coil, as long as there is no burning, peeling, generally can be used normally.
Otherwise directly after refueling "24V DC Cooling Fan" will be very unstable, the method is the first stator and rotor dust, the following have to do is give the bearing cleaning refueling. Necessary to completely clean the fan before refueling, then rinse. Cleaning the rotor shaft root method is first small rubber O-ring removed and cleaned with anhydrous alcohol to clean it, and then the rotor not into alcohol wipe clean after using cotton wool removed, set into rubber O-ring on the side dry and set aside.