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Ok rockshafts in a nutshell.... They are a rotating shaft to put it simply. In the case of the two banger John Deeres, they typically for the letter series and the subsequent children you could mount intergral equipment such as a cultivator, planter, etc. After 1953 and the resolution of the Harry Ferguson v Ford Motor Co. over the patents of the 3-Point hitch which uses the same principle of using a rockshaft to hydraulically lift an intergral implement to engage and disengage the soil (Draft Control) or to float on the surface (Response Control). So the three point hitch became the standard method of hitching and mounting intergral implements...any tractor built after 1955 will typically have one unless it was deleted at the factory. So a rockshaft is just part of the hydraulic system in a tractor as the rest of it makes up the rest of the story. There is an article on this site that deals with the three point hitch. If you get a two banger JD you can get a kit or go find an 801 hitch, which you can make into a 3-Point and put the arms onto the rockshaft - you'd have crude draft (as the pressure of lets say plowing would warp the steel top-link bracket) and have mainly response control the ability to float implements like a bush-hog on the ground. hopes this helps Christos
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