Two questions 8u and 9u

Track
If you have a small grinder with wire wheel - go over the ends of the pins, you should be able to find the master pin.
I would work to find it before I cut a track with torch or grinder.

Throwing oil - long idle time and no chance to really heat up to working temp. Probably pulling oil past rings, just a guess, other could be pulling alongside valve stems, guides worn.

If the fan belt not tight enough, can easily overheat just idling. Cracks in head around fuel injectors , pukes up watery oil. Manditory to keep fan belts tight. Hopefully this is not your problem.

Thanks for the info on the engine she’s in for new steering clutches and brakes so after that. I will run her hard and see. On the track if it’s original pin would the cork be on the inside?

Should have no cork on these 9u

Then maybe I’m not sure what I’m looking for in my parts book and service book it looks like a small plug with a while in the center. Is that not it?

The newer master pin most likely has a dimple in the center, like a 1/4 inch drill bit would make. If doing steering clutch and brake you don't want track apart. You use a jack under a track shoe on the sprocket to roll it ahead to remove cap screws holding brake drum in place.

You need to study the book to find the small hole to put you socket and extension to get the cap screws out. to free the brake drum from final drive. Count them so you don't miss one. As well as the screws from the cross shaft side as well.

Cat engines can slobber a lot if sitting at idle for a long time. Most times it goes away using it and having engine at normal operating temperature.

Okay on that 8u it has the dimples so relatively easy to find not planning to split her tracks for the steering clutch. It’s the 9u it’s a 49 year model just wasn’t having much luck and it’s kinda hard to move back and forth when the final says I’m not moving anymore and slams us to a stop. I’m anxious to get her all pulled apart so I can get to playing with her. Thanks