I recently purchased a 10/1962 Hobart g261. Miller had zero info !!
Could not find any info for service & it was missing a radiator cap !!
I found the Wix S1010 oil filter is a replacement for the cj2a Willy’s with 4 quarts of 10w30 oil & a John Deere AH539R radiator cap will fit with slight adjustment to cap tabs to tighten it up on radiator neck!!
I changed the Champion RJ12 plugs to NGK BP5S. It runs great !!
I hope this info saves someone some time & helps them with their welder !!