I do have a drawing package for it as I designed it using Pro/E. For those who don't know what Pro/E is, it's 3D CAD software. More expensive (but more capable) than Autocad which was one of the initial CAD packages to come out in 2D. Now Autocad has 3D capability, but it is nothing like Pro/E or Solidworks. Anyway, enough of that, back to the drawings.
As with most projects, I learned some stuff along the way and tweaked some things here and there. As the drawings currently stand they could be used to fabricate the backhoe. However things like tolerances, hole dimensions, and general fit of some of the parts will need attention.
I got all of my hydraulic stuff from Prince as I said before. All in all the BH cost me about $7500. I didn't figure that much initiallly but several things came into play which elevated the cost. First of all the price of steel went up significantly...like 75% since January. I've been told this is due to the high demand in China right now. I bought the bucket instead of making it just to save some aggrevation, so that added a tiny bit of cost. I also upgraded the control valve from the standard parallel type to serial type to yield better feathering performance and that cost a tad more. Also I ended up with a "power pack" so-to-speak which consists of a reservoir, pump, and filters. I could use this to power a log splitter or some other equipment if I desire, but I probably wound't do it again to power the BH. So if you factor that out of the cost it would drop the price by about $400. It is just more stuff to load onto the tractor which takes time. The advantage of using a seperate oil system to keep things seperated and safe versus the advantage of using the tractor's hydraulics which are easy to connect to and have cooling built in just doesn't cut it in my book. I would use the tractor hydraulics (like NH does with their 758C BH) in the future. One other thing is that I couldn't find a suitable trunion mounted cylinder so I had to make an adapting "sleeve" that accepts a standard rod end cylinder and has trunions sticking out the sides in the appropriate place. That cost me extra.
I was actually thinking of approaching several equipment manufacturers to see if they would be interested in looking at my design. It is just about a turn key solution for them. If not, than I might consider sellling or distributing the plans/drawings in some way. After all it took me quite a bit of time to model the thing, make drawings, and fabricate it. Then of course there is the media problem. Everyone can accept paper I guess, but DXF files or straight Pro/E files might work as well. That way I will be transfering electronic data which is faster and cheaper and people can print out their own drawings. By the way, there are many. I figure I have about 70 give or take. They consist of assembly drawings, part drawings, and some purchased parts like bushings, etc.
Sorry for the long email. I kind of spewed a lot of thoughts out here.