Removal pulley (coupling) will drive pulley set screws (coupling) on the loose, pulled out with a pulley puller (coupling). If you have not pulled loose movement, you need to set screw hole to join lubricants; if still pull no available kerosene or alcohol lamp to pull in the drive pulley (coupling) and then heating the surrounding outer sleeve. Note that when the heating temperature control, to prevent deformation of the sleeve and the motor shaft extension. Remove the bearing cap and remove the front rotor bearing cap, hood and rear cover bolts, screws, and then cover with a mallet backward direction knock shaft end, after the end cap and the base unit away from the seam, and then hand or balance suspended will be drawn after the cover together with the rotor. remove the front cover before removing the wound rotor, first lift or remove the brush, brush holder and wiring, and then remove the front cover. disassembly, cleaning and inspection of bearings: (1) removal, with a suitable bearing puller live closely inner bearing out. (2) Cleaning (except closed Bearing), hand rotating bearing outer ring, the bearing rotation in gasoline, wash the remaining oil, then oil with a dry cloth, wipe the water. (3) Check the watch between bearing raceways and balls or rollers surface for rust and scars, and then hand rotating bearing outer ring, observed rotation is flexible, bearing a final decision whether to continue to use, the user can not be replaced .