... , biting lock nut with 17wrench,counterclockwise loosen the lock nut2. Insert the tool machine front spindle hole inside, petiole to ... , not barbaric operation, otherwise it will damage the motor,4, insert tool and tighten the screw to prevent loose and slippage5 ... choose our company’s charger for the use of lithium electric power, otherwise will have incalculable consequences.the common problems and ...