Farmwithjunk
Super Member
I have the same harrow. It is a sturdy piece of equipment and should handle your four acres without a problem. Your harrow is missing all the disc scrapers, but if you don't have clay soils it might not matter too much. As someone else noted, the bearings are made out of wood, so make sure they are well greased at all times. You might want to take them apart and check their condition. If you need a manual let me know and I can send you a copy.
Never saw a #25 MF disc with wooden bearings. They're cast iron on ALL of 'em I've ever worked on. My parts manual only has listing for cast iron......