Hi, I now own two JD 400s. One is a mostly restored 1975 with a model 20 loader and 3 point hitch, the other is a running 1978 which needs cosmetic restoration. The second tractor has no implements and the hydraulic valve is missing. I've seen some used ones on Ebay so I can take care of that. I do have the three hydraulic levers.
I'm using the tractor with the loader to take care of my gravel driveway and fill in and grade some low areas in my lawn. Works great so far.