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Demand Is Booming for New No Tech, Repairable Tractor
(www.404media.co)
Whether it be electronics, automobiles or medical equipment, the manufacturers should not be able to horde “oem” parts, render your stuff useless if you repair it with aftermarket parts, or hide schematics of their products.

Summary video by Marques Brownlee
Great channel covering and advocating right to repair, Lewis Rossman
I've got my grandfathers Massey Ferguson 135. The only thing I've had to do is replace the seals. The manual explains exactly how to do it and a few youtube videos and I was good.