As to why they are not common for tractors to have a full suspension... Front suspension is very common on todays tractors, even the big articulated tractors are starting to have it. But the suspensions are usually computer controlled hydraulic to be able to not start hopping. If you think about the rear of a tractor, there are many more loads involved than simple tillage draft. What happens with 3pt implements? How about a front fold corn planter? In the field, there is very little weight on the hitch, when in transport, you can come close to overloading the rear of the tractor.
With the amount of traction involved on a hard pull, by the time you dampened a suspension enough to stop power hop, you wouldn't have much suspension left. On semi trucks, the heavy haul go to suspension was a Hendrickson for years. A hendrickson suspension is basically no suspension. There are walking beams for the axles, and really heavy springs that don't give all that much.
I would suggest if you want to improve the ride of any tractor, figure out your rear axle weight for the common jobs you do. You can then set the air pressure in the tires accordingly, this will make a big difference in the ride. I bet your tires are overinflated most of the time now.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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