This part is used on both Black and Decker and DeWalt DW735, DW735X models Dimensions: Belt with 9 Ribs Clean the pulleys off before putting the new belt on to ensure top performance and longevity with your new belt.
Inspect belts periodically and replace when worn to maintain peak performance
Please proper installation
Replace DW735 Planer Belt Guide
First part is just like changing blades, remove the top and the dust shoot. Then remove the thickness adjusting wheel and then the cover behind it. Inside the planner on the opposite side of the belt there is a safety switch, it looks like an L bracket with slotted holes, cut a 2 inch block of wood to hold it up so the blades can turn.
Then I removed the chain, one screw on each sprocket, then I removed the chain tensioner, one screw. Then I removed the small access cover over the small pulley, just turn the screw quarter turn and remove.
Now the new part. Put the belt over the small pulley, and then got the belt started on the bottom of the big pulley. Then I took my mini needled nosed vice grips and pinched the belt to the pulley, not hard, I did not want to damage the belt. Then I took a socket and turned the nut at the center of the pulley and the belt went right on. Easy Peazy. Of course it was not completely on I just put some inward pressure on the belt in front of the pulley and kept turning the nut and it worked its way on. I then noticed that it was hanging off the small pulley a little bit. Same thing, some inward pressure in front of the small pulley and keep turning the socket. Reverse the steps and put it back together.
Anyway, here are the links to the eReplacementParts.com page and YouTube for this issue: