Guys yall may already know about this minnpar place, but just in case you dont I wanted to share it because it sure helped me out. I bought an old Allis Chalmers 840 wheel loader to stay at a topsoil pile. Its a great old loader for what I'm using it for and it was CHEAP! I fixed a few bugs it had and finding information or part numbers was a nightmare. My buddy found this site and it has all kinds of OEM part manuals for older machines. I will attach the link to the 840 loader manual I was looking at. Maybe this will help someone else out... https://cdn.minnpar.com/partbooks/A...840_PARTS_MANUAL_PRIOR_TO_SN_4001_9006763.PDF
And, here is a link to the huge and complete index of manuals they host. https://www.minnpar.com/manuals.aspx