Hi Everyone!

I just bought a 1949 D4 6U and wonder what the difference is between the
6U and 7U.

Brought the Cat to my land and worked for a couple hours. Our Northeast weather has turned hostile in its last stand before spring. First plans are to lube everything and do some minor repairs before running it again.

Bought lubricating oils - Wow!! did the prices ever sting!! It's almost cheaper to skip the lube and just buy replacement parts when they wear out . .well, not quite (I'm kidding) .

I'll try to attach a photo of the new "old" baby.

tinytec aka Fred in NYS

Nice looking D4 Tinytec. Wish I had a winch on my D4-7U. The difference between a 6U and the 7U is the Track spacing, 44" for the 6U and 60" for the 7U. Welcome Aboard from the middle of the USA.

Thanks D4Jim! Yes she looks pretty nice because a previous owner painted her at some time. I bought it from a subsequent owner who used it for only a few months until he finished his few projects. The Zerk fittings are still covered with paint which means it hasn't been greased since who-knows-when.

Is that track dimension measured from center to center? Seems so I measured the track distance between the outside edges at about 5 feet. The CAT is about seven miles away, on the farm land where I grew up, so I can't run out and check it.

Fred

Nice machine! Interesting to see the slightly different linkages on the dozer lift cylinders.

"gauge" is measured from center of sprocket (track) to center of sprocket.

ccjersey,

Thank you for the explanation for 6U vs. 7U. This forum and people like you are a great help for amateur machinery enthusiasts like myself. I appreciate it!

Fred aka "tinytec"