you might try... newholland website of ford. ford newholland in idea same company. just different names. ford = vehicles, newholland = tractors.
it has been over a year or more since i went looking, but you may have to click into the "agriculture" section for manuals on the newholland website, or you may have to click on lawn care or something. pending if tractor is more of a riding mower vs a tractor.
i know newholland/ford has a dedicated website for "parts" were i can type in model number, and get a detailed view of all parts and part numbers. along with diagrams of parts.
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personally prefer shop manuals, they normally give in depth descriptions and how to tear something apart and put it back together and to test this or that.
the owners operating manual, more likely give you info about what type of oil, how long between servicing filters, what gear to place tractor in, to do this or that.