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| The engineer who designed the power shift was in charge at Ford when the SOS was designed. But he departed from Ford because he wouldn't approve producing the SOS and was overruled. He worked the rest of his working life at Deere. He made sure the Power Shift was sturdy. Neighbor ran Power Shifts for about 35 years, never broke one. The SR gets wrecked by towing with it not in TOW. The PS probably doesn't do well either if not in tow when towed.
I remember hearing the neighbor pull out of the field from cultivating at my old house. He start in a low gear and run the engine speed up full then shifted the PS up through the gears. If I happened to go the mail box before there was much traffic on the road, I could see a divot from the rear tires for each shift that I'd heard.
The SR tractors pulled a bit more on the drawbar than the PS tractors.
Gerald J. | |
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Specific Question re JD 4020
