1,Demolition drive pulley (coupling) to drive pulley (coupling) on the set screws loose, and pull out a drive pulley (coupling). If the song does not pull dynamic, you need to set screws in the hole by adding lubricants; If not pulling, kerosene or alcohol lamp can be used in the drive pulley (coupling) cylindrical sleeve around the heating and then pulling. Attention should be paid to control the heating temperature, and motor shaft sleeve to prevent stretching deformation.

    2,the demolition of the rotor bearing caps and bearing caps before removal of the wind and after the end caps cover bolts, screws, back cover and then use the mallet axis direction stretch out side, so that after the seat cover and away from the sewing machine, and then hand or rotor with the balance suspended with after taking the cover.

    3, the front cover to remove the rotor winding in the demolition of prior filed or remove brush, brush wire racks and primers, and then to remove the front cover.4, Dismantling, cleaning and inspection of bearings: (1) the demolition, with suitable living closely with the pull bearing bearing inner ring will be pulled out. (2) cleaning (in addition to bearing the entire closed outside), hand-bearing outer ring rotation, so that rotating bearings in gasoline, residual oil washed, and then with a dry cloth to oil, water, dry. (3) check to see the bearing raceway and the balls or rollers between the surface of any rust, trace, and then hand-bearing outer ring rotation, whether to observe the rotational flexibility, bearing a final decision on whether to continue to use, the user can not be replaced .