Little oil leak D-6 9U

Here is a picture of the oil leak.

It is coming out of the final drive seal on that side. may have a loose or bad bearing. Not sure about the repair procedure but I believe you need to pull the sproket. That takes a good puller and needs to be pressed back on. Meanwhile make sure you fill it when you use it via the pipe plugs right inside the track on the back.

Worked on a road job back in the 50's and we had a D-6 pulling a roller. One final drive started leaking pretty bad. Boss didn't want to shut it down as we only had about a month to finish before winter. Older Irish fellow was the oiler. He told the boss, I think I can stop that enough to finish. Boss said go ahead. He went to town and bought a couple boxes of cornstarch and worked it in as he was filling the final drive. Took about an hour and it quit leaking, seeped some but we finished the job and they fixed it right that winter. Worn bearing that let the seal get out of line.
Sometimes they just do that and I you run them a while they will quit if your lucky.