This you may have to contact Kubota customer service or a dealer because there may not be many people in possession of a 520 for quite some time. Most dealers are saying they can't even get one yet.
Good luck, hope you find your answer.
Just got my new 520 with the plow option. The part# is V4308B on my build sheet. The part# in the 500 brochure is V4308A, so not sure if there is a difference between the two. Hopefully this will help you out if you have access to a dealer. On a side note I am super happy with the quality of everything and the dealer I bought it from. Awesome machine!
Been trying to get some hours on it before winter. I'm really impressed with the quality of the build. Everything is heavy duty as you would expect from a farm implement company.
Right on. Hope it treats you good. I like the looks of it. If only I had any luck selling my Polaris's....one of those would make a good mate for my RTV1100.