D30 update

To update my older post:

After 3 months of work, I now have a title for my 1940 D30. What a PITA! I also got my winch on my trailer to go retreive it.

So, now for the next battle. I have 6 flat tires with bad tubes. It needs to roll, the truck currently has 6.00x20 tires. I can get some free 8.25x20 tires and tubes. I was thinking of putting 4 on, so it will roll around a little easier. Anybody forsee any problems with this? I also need to get the brakes to work good enough to unload from the trailer.

I would also like to find a parts truck within reasonable driving distance. I am curious if a KB5 might be a possible donor for some parts. I think there are alot more of those around. I would be nice if I could find some tires that held air and weren't falling apart.

I'm guessing cast spoke heavy 20" wheels?
Mounting tires on these can be a chore. Especially if your hands aren't used to this activity. Like everything else, you'll be a pro as you proceed. These take metal valve stem tubes. Don't forget the flaps for each tire/tube.
Finding someone else to mount these antique split rims (the rims really are split) might also be a chore.
Really rusty rims shouldn't be used. One giveaway is that the lock bead is sharp. It shouldn't be. Here In CA most of these I check are still usable.
Tire Talc on the tubes, inside the tire and flap is a good idea. You need to take something and check everywhere inside the tires for nails and screws protruding that will puncture the tubes before you mount. You can use your hand but you can cut yourself badly that way.

As to the tire size, it will depend on what rims width you have. For "rollers" you could possabley stuff the 8.25's on 5" rims but it would be a chore. 6" or 6.5" qould be easyer.

And yes, CB is right again, those 8.25s might be hard to get on those skinny rims.
Personally, I've purchased an old (inexpensive) truck before that I didn't want just to get good 6.50 x20s.

Today I found a local guy who has IH parts trucks on his farm, he thinks he may have 6 ok tires (that hold air) and they're already on dayton rims. I told him I didn't want to have much money in them and he seemed ok about it.

He said there are very few D series trucks in this area, K series trucks were a little more common. He doesn't have any D-K parts trucks and doesn't know of a D series parts truck anywhere close.

So, here's the skinny on the 6BT cummins swap. The D30 has 33" between the firewall and radiator... My 93 dodge W350 has 37" and its a tight fit in those early ram diesels. I initially think the firewall is going to get recessed, I'm not sure if the radiator could move forward, but the intercooler needs to go up there anyway.

So right now it looks like this on powertrain:

-92 160HP 6BT from a dodge D350, tweaked and modded heavily
-NV4500 5 speed 4x4 trans
-Early 90's dodge gas burner NP241 transfer case with a 29 spline input swapped in from a later diesel case
-3.73 ratio D60F and D70HD rear from 83 chevy 1 ton 4x4 dually
-8x19.5 wheel and tire combo from GM bread truck chassis

I like the direction this build is going. I'll be watching with interest!

Dean

The real nice set of tires are 9.00x20 on IH Dayton type wheels (cast iron spoke centers. Could these be made to work?

I love those wheels--not exactly light. I wonder about wheel inbalance at say..80mph.
I think they're impractical for freeway stuff.

I don't have any freeway intentions for the current setup of the truck. If it will roll around without destroying the concrete and stop with the handbrake that's all I need right now.

FWIW, I have an old IH parts book for the D30 and DS30. It turns out the trucks were available with 5,6,7, and 8 inch "spoke" type wheels. Theoretically a 9 inch tire should be on a 7 or 8 inch rim. So, those wheels and tires I found might just work. I'll have to get the tape out to be sure.

The parts book and sales brochures I bought are a good resource, it's neat to see what was available back then and what it looked like when it was new. I wish I had an owners manual for the D30...

I suspect the spoked portions stay the same and just the demountable rims change width? Of course I could be wrong.
I've never measured the demountable "split" rim. Maybe they are different widths. I've never noticed.
I do know that they can rust and be unusable. The "ring" part gets sharp where it meets the rest of the rim. It shouldn't be sharp.
Would you mind taking pictures and posting of what you're doing? We love pictures here and you get more and better responses.