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1690047 - Low Speed Kit
This kit is only used on the 710 tractor to give slower ground speed when tilling or blowing snow. It consists of a larger pulley on the transmission input shaft and a long belt and belt guide. The 1690047 kit will not interchange with the old 1600297 kit used on the 410 model 3-speed.
Source: Dealer Sales Information, 700 Series Tractors, date unknown, courtesy of Del Allen.