I have a couple of those saws, one's an early 80's vintage - any of their manuals should help with general stuff, but be aware - their newer ones (even if you COULD get parts) have crappy aluminum blade guide carriers - the earlier ones used actual cast iron, tend to hold settings much better.
There's a bit more info on page 3 and 4 of this thread
Off-Road Bandsaw - Shop Floor Talk
including a different way to get good alignment for straight cuts.
BTW, you want a 64-1/2" x 1/2" blade, not sure if I have a PN# for the blade guide bearings but you'll probably need some. You also should pull the top off the gear case and see what that looks like - the gears are typically some type of brass or bronze, and should NOT be lubed with any sulphur based gear oil -
This
https://www.amazon.com/gp/product/B007UU9V8A/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
is what I use on anything with non-ferrous parts. When you're looking inside the gearbox, check for any gritty stuff mixed with whatever lube is left - if you feel any, you should flush the box and gears with a good solvent, dry it out thoroughly before adding the new lube.
Be
REALLY CAUTIOUS when feeling inside the gearbox with fingers - if there's much wear on the worm gear it can be
RAZOR SHARP
If you intend to use the saw very much, I would NOT recommend wasting your money on HF's blades - Starrett or other name brand bi-metal will hold up much better.
HTH... Steve