4020's I think still very well may be the most popular tractor JD made. Very durable, well made tractor. I have put thousands of hours on different ones for different farmers growing up and even today.
One note on the loader. Go easy on the tractor. Most tractors of this time, JD, IH etc, the loaders were not really thought of. The 4020's that was one of the biggest weak points was people would add a loader later and the axles would break. Some company I have seen even sells an upgraded axle. I have a friend that I help and we move round bales with his. The bales are probably 1000-1200 lbs and the heavier ones you can tell are a load on the front axle.
One note on the loader. Go easy on the tractor. Most tractors of this time, JD, IH etc, the loaders were not really thought of. The 4020's that was one of the biggest weak points was people would add a loader later and the axles would break. Some company I have seen even sells an upgraded axle. I have a friend that I help and we move round bales with his. The bales are probably 1000-1200 lbs and the heavier ones you can tell are a load on the front axle.