Reader Dave said:
I am sure that myself and others who pull from the drawbars with these tractors would like to see any way to get traction boost from only the drawbar!
Well, Dave, I wish I still had the tractor, I would show you. It worked and worked very well. After all, the early (Series I) D17 had such a simple hydraulic system, it didn`t care whether the oil went to the cylinder that raised the lift arms or to the remote outlet seeing as they were connected together. Under a hard pull, the drawbar compressed the snap coupler spring and if the traction booster was adjusted right, the result was increased oil flow to the remote outlet that effectively raised the harrogator. Nothing was attached to the lift arms and the engine load was constant, uphill or down. The traction booster effectively put more of the harrogator`s weight on it`s own wheels.
It worked like a champ.