Rich: For 150 horsepower, I want 6 tires on the ground, 8 would be better. Sure we can load these tractors with chloride and wheel weights until there is no slippage, and they will pull, but what is it doing to soil, tires and power train. When I talk efficiency on tractors, I think they should last 30,000 hours
Conventional two wheel drive tractors have traditionally excerted drawbar pulls roughly 2.5 to 3 times their own weight. Some of the articulateds are pulling 6 times their own weight. You increase that ratio greatly with floatation tires, dual tires be it 2, 4, 6 or 8 tires.
My 1066 was delivered to me new on 20.8x38 singles, loaded to the limit with chloride. I had two complaints; 1. Tires were toast within 1,000 hours. 2. On my 24' cultivator the tractor left wheel tracks the cultivator could not smooth out. I disliked very much trying to plant or drill a uniform depth on that surface. One could also see the crop did not do as well in those wheel tracks.
The second year I installed 4 new 20.8x38 same brand tires, no chloride, no wheel weights. Those 4 tires lasted 9,000 hours. The tractor actually pulled the cultivator or my 88 blade Bush Hog disk easier than with single tires and weight. Gone were those annoying wheel tracks to plant or drill over. Also gone was the noticable less crop in those wheel tracks.
We've now gone to 42" and 46" tires putting even more rubber on the ground. I've driven 3 of the 300 hp articulateds, 2 Deeres and one NH. 20.8x42 duals. I actually like the NH best, this surprised me as before the fact I figured Deere had the best tractor. Those machines will almost float. None of these tractors had any chloride. They do put rear wheel weights to insure both rear ends are getting close to same traction.
I'm not cncerned about which tractor or which wheel equipment will give the most drawbar pull. It's all about efficiency.
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