Kubota loaders and what they fit is confusing at best. It is important to realize a single loader will always fit several brands and models ,,,,,BUT,,,,,,,,,each brand and model requires a specific mounting kit. Kubota doesn't go out of their way to let owners know this and list each loader with mounting kits for various tractors. Personally I believe it's a ploy to make it hard to buy used loaders so that folks buy new from dealer. I can tell you for certain a Bush Hog 1840QT fits your B1750 HST. I suggest you look at Bush Hog brand or other brand that accomidates customers with spreadsheet listings of mounting kits. To get the feel for what I'm saying go to German Bliss to look at 1840QT loader and numerus kits for various tractors.