Going after my fathers 1950 VAC next weekend. Was running great last time it was cranked about 5 years ago. Looking for advice on steps to take before cranking again, where to buy parts, restore advice.
Parts: Steiner
Steiner Tractor Parts - New Restoration Quality Parts for Antique Tractors
Before trying to crank, I'd pull the plugs and see if you can turn the engine by hand (assuming you can get a wrench on the belt pulley). If not, bump it with the starter. If it cranks, put the plugs back in, be sure the fuel shutoff valve (if any) is open, and try to crank it. If it's a 6V positive ground system, the starter motor might crank slowly. If so, clean the contacts on the battery cables that go to the starter and try again.
If it doesn't start after trying everything you can think of, check the compression on each cylinder dry and wet. It should be 100-120 psi for an 8:1 compression engine that's in good shape. If the pressure less than 80 psi, you may have to replace rings and valves.
Restore advice: you best friend is your digicam. Don't remove anything before you have thoroughly documented it with pictures from enough angles so you know how to get it back together again.
Use zip lock bags to hold small parts and label the bags with a ball point pen, or something that's not going to be washed away by oil and grease.
Before disassembing anything, note the locations of all fluid leaks and get photos.
Power wash the tractor before any disassembly.
Post back with lotsa pictures and we'll continue to give advice (for whatever it's worth).
Good luck.
BTW: I have 5 old tractors in various stages of restoration now.