Kubota B2710, IH TD6-62 dozer with Drott 4n1 bucket loader
A 14.5 amp dynamo is standard. The high capacity alternator upgrade which I think is 40 amps is part # B7311 and retails from whole goods for $165. There are several threads describing the "how to install". It just takes a few hours to install.
Here is a link to a thread on installing it on a B7500.