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It depends a lot on the year and options. Early D10/12s (1959 to mid 1961) did not have any form of live PTO and did not have live hydraulics if they had traction booster (early models without traction booster had the hydraulic pump on the engine and thus had live hydraulics-I've seen this mostly on high clearance models). In mid 1961, AC increased the engine size from 138 ci to 149 ci (bigger bore), added independent PTO and hydraulics, and made other improvements. All Series II and III machines are post-1961. Draft sensitive factory 3-point hitch and a two range transmission became options with Series III. A 3-point hitch adapter for the AC Snap-Coupler hitch will set you back about $500. Nobody markets adapters for the D10/12 but there are comercial ones that you can make work. Availability of Snap-coupler implements varies - plows are generally available. The D10 and D12 differ in wheel spacing and adjustability of the wheel spacing. There were high clearance models in each. The D10 was meant for 1 row cultivation, the D12 for 2-row. More D10s were made and they sold for a little less than the D12. The D10/12 has great rear wheel traction for loader use, but the front end is built a little light for loader loads and power steering is rare. An early D10/12 is actually less useful than a CA due to elimination of the hand clutch. These go for $1500 to $2000 in good condition. A late model Series III with factory three point and two range transmission in good condition will go $4000. The post 1961 D10/12 is one of the best 30 HP 2WD tractors made. I have a 1963 D12 and love it. They lack only a differential lock and power steering to be fully modern.
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