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 Willys 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 !!