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Glen, On the high drum cotton pickers (20 spindles high) bull gear housings were mounted on the flange type rear axle housings. These housings raised the tractor for additional crop clearance (along with a tall single wheel guide fork) and reversed the operation of the tractor so they had 5 speeds in the direction of travel which now had the former rear of the tractor as the front of the cotton picker. On the low drum cotton pickers (14 spindles high) the rear end was reversed by turning over the differential and using a reverse transmission top which had the forks and shifter on the opposite side from the regular top. This also acomplished the reverse operation. After two row self propelled pickers came out, a lot of former high drum cotton picker tractors were converted for use as spray rigs by using the high drum bull gears and guide wheel to obtain crop clearance and the low drum reversable transmission top and flipping the differential to get it headed in the right direction again. Although there were initially a few high drum H cotton pickers, they were underpowered, and most all high drums were mounted on M's and later models of the same design sise (SM, 400 & 450). Most low drums were mounted on H's and same design size (SH, 300, 350)although lots of low drums were also mounted on M/s (SM, 400, 450) and some low drums were mounted on C's & SC's. In our area, were most all of the pickers were high drum, once the two row self propelled cotton pickers came out, the one row pickers faded away fast, althugh IH continued to build one rows for a number of years for use in certain areas. Harold H
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