Check before use. Open the cover and check if the dust bag is tight, if the suction is fastened, and cover the cover.
Check the supply voltage and, if necessary, note that the motor is reversing.
Replacing the belt. Some industrial dust collectors with belt drives need to be replaced with new ones, and the back door of the dust collector is opened for replacement. If the belt is loose, open the side door and adjust the control nut to the proper position.