Hi Grant, I just re-read your message, and saw that you wanted pictures of upper mounts. If there is anything more you would like to see let me know. It looks like some metal was trimmed off the upper right corner of the tractor to accommodate the brake actuation. 

That lever looks just like a slack adjuster for truck or trailer brakes to me. Nice winch. JM

I think the difference between the D-4 & D-4-N was the D-4 had a brake band, and the D-4-N has brake shoes. From the outside these winches sure do look heavy. They have the appearance of a solid chunk of steel. I wonder how much they weigh? It says on the ID plate "Towing Winch". By that label, you can lock the brake and drag a log with the tractor? There was a heavy duty choker on the dozer when I got it. I'm thinking it was used to drag logs out of the woods with the winch. I'm thinking I will put some heavy cable on the winch that is rated over it's pulling capacity, but can possibly drag more? Is that a good idea?

no idea how much freefloat it had never measured it. have started converting it to a modern diesel engine to start it.
have to pull the finger out and submit a article to the magazine about it.

Those fenders sure look like the late model 6U/7U fenders

What's the difference? I could measure them out of curiosity's sake, or take a picture if I knew what to look for. One thing that's for sure... whatever is on there is staying on there.

Hi, R2D2.
If my memory serves me rightly, it was with the U series that they got the heavy steel plate fenders as shown in your photos. Earlier models had 'tissue paper'/sheet metal pressed fenders..

Just my 0.02.

Thanks! That would explain why I've seen pictures of bent fenders on the web. I will give a closer look at the fenders on my dozer next time I'm there. It would be hard to mount any kind of operator protection on flimsy fenders. Stronger is better!
I doubt the protection on it now would be of much use in a roll over, but would be of help with branches in the woods. I knew a guy that had a small open crawler roll over on him, but he was on a brush pile, and the spring of the pile saved him. This dozer is heavy. I can attest to that when I jacked up the trailer with the dozer on it. The 20 ton jack sunk into the 4x4's under it further than anything I have jacked before by quite a bit.

Hi, R2D2.
Your machine would originally have had the lighter pressed metal fenders. I suspect that somebody has done some work on your machine prior to adding the canopy 'coz they didn't like the idea of mounting it on the lighter fenders.

Quote:
"I think I saw that a wide gauge tractor may have been required for the D4N. I'm sure others can clarify that."
Unquote.

Your machine izza wide gauge. The U series was the first and the last to have different numbers in front of the designation for the model. Previous models mostly just a "W" after the serial number to indicate wide gauge.

Your blade's hydraulic set-up has the distinct advantage of raising the blade on the 'push' stroke which has more power than the 'pull' stroke due to bigger total piston area.which includes the end of the shaft and retainer nut. This wasn't as much of an issue with later higher pressure hydraulic systems.

Just my 0.02.