The specs I found said 40.
I think some people are not getting it. It's not just one belt. This thing is full of bad engineering and expensive parts. For example, no one should ever make a hydraulic cylinder which is welded shut on both ends, while charging way more for the part than a correctly-designed cylinder costs. My tractor has two of those. Some guy on the web got so mad, he cut his cylinder open with a lathe and rebuilt it.
The grills on these things are made so they fall out if you're not careful, and the first sign the grill has fallen out is the sensation you have run over something. You're not going to see it fall while you're on the tractor. This destroys the grill. Before Deere discontinued it (thanks), the grill sold for $465. This is a cheaply-made part that weighs around three pounds. Used ones now sell for $900 because so many have been run over. A Kubota grill which is much nicer, bigger, and more complicated (and can't fall out) was something like $75 last time I looked.
My Kubota is about 20 years old, and when I priced a muffler out of curiosity, it was lower than a 430 muffler, and the 430 is just a hobby tractor for yard work.
I don't believe in rooting for manufacturers like they were sports teams. I'm on the side of other people who buy products and have to deal with them. I have zero brand loyalty. After all, they're not loyal to me. Nobody at John Deere owns a Suburban Plowboy hat or paints his barn Suburban Plowboy red. I don't care if they go bankrupt tomorrow. I'll buy something else.
I have a Lincoln welder. I put two Chinese welders right beside it. I'd buy a Miller if I thought it was a good deal. I have a Ford. I have a Dodge. Next car will be a Toyota because they're the best all-around cars made.
This will be my last Deere product. I would really like an excavator, but I am willing to give another company a chance.