My grandpa has had an old unstyled D for years, used it as his farm tractor for quite a while. When I got started on this old tractor hobby a few years back, he drug it out after sitting for quite a few years, and got it running. IF you'd call it that. VERY low compression. Large hole in the manifold, welded studs on the manifold, etc. Needed plenty of work. And a time later, I happened to run across this neat thing called Green Magazine. Then managed to find an article on the industrial DI. On a whim, checked the serial number, and my grandpa actually had a DI! #140337, shipped to Ohio, and still there!!!!
Well, finding this out definitely made me want to "do it right" on fixing it. Therefore it has pretty much sat sense then. The major factor has been that there is no place to work on it. Everything I have to work on needs to be able to be moved (can't sit in the shed, cause something else always needs maintained, worked on, etc). The DI should be able to sit for a while.
This weekend we finally FINALLY

Me on the 70, my uncle on the DI, for the slow trip to the "farm". Back to the shed where it sat in the first place!

Finally in the shed. Removed the left front tire, as it was, well, TRASHED

Another front tire on so it can be rolled. And the radiator is off. An AMAZING amount of rust inside the head and radiator. The radiator needs a new core too. Has anybody used K+K for unstyled D cores? Happy with them?

Off with it's head!

The head with the cracked, welded and goobered up manifold.

The BIGGUN's. The cylinders that are BIGGER than a coffee can!

Removed a few more parts, waterpipe, fanshaft, etc.

What was left of the manifold after actually REMOVING a few nuts and BEATING the rest of it off. I will sell on Ebay as "Rare for DI only, NOS, some shelf wear only". Just kidding of course!

Can you believe that all but one of the manifold nuts+studs came out? My grandpa's proper application of a chisel and hammer managed to get 'em!
I still cannot believe that the studs came out. The nuts had been WELDED on a couple!

The valves. Bigger than most small engine pistons!
Though the tractor will need work, it actually doesn't seem as bad as I imagined it would be. So far...
It is missing a few things, like most of the left hand wheel brake, which is a DI feature. Luckily the styled D used the same stuff.
My questions so far:
Are K+K radiator cores any good for the unstyled D?
What is a source for authentic (right thickness, etc) fenders? I know there is more than one supplier, but some are thinner I've heard?
I've seen repop air stacks, but haven't caught the name. Anybody know who makes 'em?
Anybody have any paint codes for the CORRRECT bright yellow that they used? The stuff that JD sells is useable, but too orange in my opinion.
I've got a couple numbers, but haven't compared yet to the few spots left on the tractor. Just any other numbers would be nice to compare.
By the way, this isn't a solo adventure. My grandpa, two uncles, and I are all messing with this thing. None of us like having our picture taken. But I do like TAKING pictures!
Brandon























































































