At the top of your post next to "Model Number:" is the model number you entered, A702. It is a link to the parts available. While it is too old for them to post a parts manual, they do have them categorized.

Good luck getting the agitator off. I had one of those old Maytag, ringer washers, years ago and needed to remove the agitator. There was a decorative top or finial with a threaded bolt sticking out the bottom that screwed off. It looked like part of the agitator, but screwed off like a pickle jar lid. You may need a band wrench or good grip to gain enough purchase to get it to unscrew. I'm certain it had RH threads. For mine, that was the easy part.

The lower half of the agitator was a friction fit on a splined shaft coming out of the trans. Getting it to come loose was a bear, all due to corrosion and age. At that time was nearly as old as yours is now. But with some prying and praying I would not crack the agitator, it eventually popped off. There may have been a bit of taper, because if my memory serves me, and sometimes it don't, once it popped loose it just lifted right off.

There may have been some screw holes that a wheel puller would properly have worked in, but I was poor and didn't have a wheel puller at that time and I don't rightly remember if the Maytag agitator had those wheel puller holes. I'm still poor, but now have a wheel puller.

I can't help with the rest as I'm just an amateur repairman. I fix my own stuff and that's about it.