John Deere 4020 oil change

This is a straightforward owner-filmed oil change on a 1967 John Deere 4020, showing the actual mechanical steps: draining with a 1/4 inch socket, pulling the cartridge filter with a 9/16 socket, re-oiling the new O-ring, reinstalling the oriented cap, refilling with 12 quarts, checking for leaks, and confirming the dipstick reads full after startup. No specs discussion or troubleshooting beyond that. Useful for 4020 owners wanting a real-time walkthrough of this specific service.

Posted by the 1stgenfarmers& ranchers channel, an owner sharing a hands-on maintenance task on their own tractor.