It would be very unusual to have a transmission belt problem. To access the belt; the handle, and switch cover plate are first removed. Next remove the 4 screws that hold the upper motor cover in place. Next remove the switch button by prying up gently on it's attaching lugs and pull it free of the switch actuating rod. 3 screws hold the transmission to the base. DO NOT remove the screw in the rear beneath the on/off pedal. By dropping the power drive assemby slightly down, you should be easily able to remove the belt. P S: I have repaired 100's of power drive Kirbys, and have never seen a bad power drive belt. If the self-propel seems to work poorly, it is usually because the rear wheels are worn out.
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It would be very unusual to have a transmission belt problem. To access the belt; the handle, and switch cover plate are first removed. Next remove the 4 screws that hold the upper motor cover in place. Next remove the switch button by prying up gently on it's attaching lugs and pull it free of the switch actuating rod. 3 screws hold the transmission to the base. DO NOT remove the screw in the rear beneath the on/off pedal. By dropping the power drive assemby slightly down, you should be easily able to remove the belt.
P S: I have repaired 100's of power drive Kirbys, and have never seen a bad power drive belt. If the self-propel seems to work poorly, it is usually because the rear wheels are worn out.