Mostly setting throttle against implement depth. Also, for most tractors it is best to set a tillage implement in the ground while some forward motion is taking place. As far as I am concerned it is the best way to have an even headland with a semi-mount plow. I've had compliments made for some fields I plowed where the finished result was so even it was not easy to tell where the round ended and the headland started. Obviously, the headland sticks out more in clay than sandy loam in the best of jobs. For PTO loads it is always best to start at somewheres near 1/3 throttle and then accelerate such as with a rear unload beater type manure spreader. Guys who would start the old style PTO shifter H or M at full throttle while under load seemed to have more breakage issues. Just my observations. Back to tillage I remember a neighbor years ago telling me the only way to start a round was stop , drop the implement, release the clutch while the engine was maybe a third of full throttle, and then accelerate to full throttle. While riding with him aboard his Case crab steer he tried to demonstrate this and the Case stalled out on him. I did not bust his chops about it.
As far as the R's go I can only tell you what was told to me and this was by guys who were not so JD that their dinner plates had the JD leaping deer on them. I am not going to dispute that a large cube 2 cylinder diesel does not have a bark to it. The one guy did pull 4 X 14's in hard ground so there is that. I don't know what he had for rear tires or ballast. I do know what a difference radial tires make with our own tractors. Also, the guy who broke a R PTO shaft was running a JD 346 baler which no doubt the tractor drive line was not meant for. Probably works OK if not loaded heavily but start ramming the hay to it and ........................ I am glad we bought our 347 versus the 346 as the drive shaft is much heavier (class V ?) on the 347.
If you want smooth operation out of a standard from that era I have seen a couple Case 900's and they do impress. Actually, the best tractor we had for starting a load from low throttle was one that we had a lot of trouble with and get sent away after 5 years. Dad found himself a deal and if the dealer had done his part maybe that tractor would have made a much better impression on us.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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