In the first version of this so-called manual, I encouraged everyone to machine their own parts. Now I think that's not such a great idea. You could make the motor yourself too, but why? Unless you already own a big metal lathe (not the hobby sizes... the pieces we are making are too large), a really exact drill press, a metal band saw and have a lot of welding experience, you can't do it. You could hire a local machinist, but... if s/he's doing this for the first time, they will take more hours (and therefore charge you more money) than the company we had do the work for us (who I am NOT affiliated with in any way, and who I do NOt profit from in any way.)
What really made me change my mind and this second draft was when I recently did a second bolt-together of the machined stub, ring and cluch plate (this should only need to be done ONCE in any electric tractor's life-time. We have massively over-engineered this part of the project). It's not complicated, four screws and maybe 90 seconds of effort, BUT it needs to be aligned perfectly. Although we had machined the pieces at the shop, and put them together right there with a nifty little jig they made to force perfect alignments, I wanted to do it as though I had machined the parts myself in a home-shop, and then I could write about how easy it was to all of you!
Well... it LOOKED right, but without the jig, I was just a bit off! Problem is, you don't know it's wrong until you've put the whole thing together and start to drive off down the road. Then it goes "WHUMP-WHUMP-WHUMP". I had to take the *whole* thing apart and redo it from step 1, borrowing the jig. If you order the parts from Niekamp, they pre-bolt them together for you at the shop for free with the jig and you should NEVER have to deal with this problem!
All this being said, if you REALLY want to do it yourself because you love your big lathe... (or maybe because you need to justify the purchase to your spouse) then go ahead and download the plate, stub and ring diagrams included here. While these are exact traces of what we are using (as well as CAD diagrams with precise measurements) I am frankly worried about things getting shifted or distorted in the scanning process.
If you know enough to take this project on yourself, then you certainly know enough to re-check the measurements with your own tractor and the motor you buy and then you'll be fine. In the cases where you are just bolting your own created plates together, then just choose one to be the master and make everything else line up to that, and again, you'll be fine. If you just take these traces and CAD drawings out to the shop and start popping them out blindly without re-lining them up on your own tractor and components, then you may be sorry!
Go here to download the free autocad reader you'll need to see and print the CAD drawings necessary to machine the parts.
Right mouse click and SAVE this link to your desktop: Bell Housing CAD (14K)
If you do decide to download these sheets and machine the parts yourself and have any questions or need clarification you CAN email me and I will respond, but please try to figure them out for yourself first, and be sure this is something you actually DO want to do yourself. Print out all four of these pages, and sit with them as you look at the tractor taken apart in front of you, with the motor and other components sitting next to it and things should start to make sense. It has only been a few months since I worked on this physically, but I have to admit it's taking ME some time to orient these things correctly. It's rather discouraging to be honest. I do remember, though, that when the parts themselves were in front of me, it was very obvious, and many of the component screw-holes we made using the components themselves as a guide.
Don't forget this entire page is COMPLETELY OPTIONAL. Niekamp Tool Company now has several sets of all necessary parts pre-made in an efficient assembly line type process waiting at the shop to send out.
Okay, now go on to the Installation Instructions and you're ready to bolt the parts together!