D6-9U rail numbers?

With something like that freight or travel is very important.

Sounds like your tracks are so shot that it would be impossible to tell much by measuring across several pins. I expect your sprockets are gone as well?

Original were 6.75" pitch and also used on #6 shovel, 951,955,977 loaders as well as the D6. Later tracks for the D5 are 6.91" pitch.

I have had good luck rubbing over the numbers with a pencil on paper to pick out the digits after a light sanding or scraping to get the worst of the rust off.

On the 4-sale page Porter has a set of D69U tracks listed. He is in Idaho.

If you want to come this far, I have the recoil spring assembly. Probably should put a new bolt through it before you install it since it's a pain if it breaks later and over tension the track.

Also have some usable tracks and sprockets to go with them I believe I could sell. There are two ways of replacing the sprockets. Easiest way for most folks is to cut off old ones and weld on replacement rings, any competent welder can do this. The other way is to pull the sprockets from the tapered splined shaft and press the replacements on, requiring a good hydraulic press and tooling for the job. This does allow the replacement of seals on the inside of the sprocket if they are leaking gear lube down the inside of the sprocket. The seals on the outside of the sprockets can be replaced without pulling them from the hub.

One thing to check before you make the decision about which way you want to go with the sprockets is to jack up the rear of the dozer and then put a long bar in the sprocket spokes etc and shake it to see if it will move at all. A small amount of movement (mostly up and down) may only indicate the bearings need tightening, but much movement at all (usually a lot of side to side) means the sprocket has worked loose on the splined hub. This almost always requires replacing the sprocket and hub assembly to fix it permanently (or just replace the final drive as an assembly with a good one). Have those too😆

We have a running dozer and several we are parting out for our own use and for others if there is anything else you need.

It would be a good haul to your location.

Next long break i get im gona check those sprockets out and see were im at with them. I do have a seal leaking on one of them, but i just dont think its worth takeing the sprocket off and back on for a seal? I was thinking on just wraping some trotline string around it to slow it down some and just splash a few quart of gear oil in it everytime i run it? lol... I have 4 acres to clear and a 1/4 mile of road to build past that it wont be worked too much. I will problably end up selling it.

I will definatley get back with you though as soon as i can figure out what all im gona need. I appreciate the advice too. whats the ball park price range you would be asking for these items?