Check shaft alignment by making sure shaft is perpendicular to the side plates and the shafts are parallel to each other. Take measurements from corner to opposite corner to check if shafts are square to each other. Adjust shafts as needed by following “How to adjust skimmer shafts”.

Check sprocket to see if they are moving on shaft – check for clean marks near the sprocket to show that it moved from the original position
Shaft collars have been installed on prior DAFs because the sprocket hubs were not made to allow proper clamping