Donald Lehman
Well-known Member
Was checking over the stats on some tractors that will be at the local auction tomorrow. IH Hydro 186. 105 pto hp. and 79 drawbar. Compared to my 1955 at 108 pto, and 90 drawbar and the 986 IH at 105 pto and 90 drawbar. I was aware that the early IH hydrostatics were horribly inefficient as was the early JD power shifts. The Oliver brass was always driving that home to it's dealers back then, too. If I remember correctly, the hydro power was 93% and the hydraul shift was 92%.
There is a Ford 9600 there also. 135 pto and 111 drawbar. 24 hp loss. Oliver really did have a good selling point with the efficiency of their drive trains. Which goes a long ways towards explaining why our 1650's, performance wise, came within a mouse's whisker of our 4020 JD. (1964 4020)
There is a Ford 9600 there also. 135 pto and 111 drawbar. 24 hp loss. Oliver really did have a good selling point with the efficiency of their drive trains. Which goes a long ways towards explaining why our 1650's, performance wise, came within a mouse's whisker of our 4020 JD. (1964 4020)