Re: Belt wear on 40" two blade commercial mower
One thing you can look at, though you should notice the engine loading up. Put the whole machine on a level flat surface, and cut a block of wood just right so you have a feeler gauge, and check the blades for being level or a little lower in the front. If they are lower in the rear, the blade will have to cut the grass twice, doubling the load on the mower.
When I use the 40 inch commercial on my old L, I have to make sure the deck is leveled or tilted forward, or the tractor struggles to pull it. It takes all my tractor has to run that deck. I ended up modifying my 40 inch to make it level out, I am using the smaller 8 inch 4.80 tires. I think the later mowers used a larger tire and did not have this problem.