It might be helpful to new Kubota shoppers, like myself a few years back, if we reminded folks that the "number" on a Kubota loader has meaning. If it were in pounds, (English) we'd all understand right away, but because it is in kilograms, the rest of the world's unit of measurement, it doesn't "click" with us.
To get a quick idea, just double it, in your head, and add 10% more and you'll be close enough for hand grenades and horseshoes.
2.2 times kilograms will give you pounds. Thus,
an LA243 loader = 535 lbs.
an LA524 loader = 1153 lbs.
an LA854 loader = 1879 lbs. and so forth.
Wish someone had hit me over the head with that obvious 2x4 when I was shopping, early on. Just rough rule of thumb, but it'd been helpful.
You are close, the last number is the series number the first 2 indicate the lifting capabilities in kg at the bucket pivot pin.