So I've been giving it a good once over before getting it to work. One zerk was missing and I replaced but it was for the static thumb. Greased everything, changed engine oil and filters, changed hydraulic oil still need to do filters.
Issues/questions
1) Someone has taken the covers off the final drives and tack welded them back on instead of using a wire so I can't easily pop them off to inspect. The covers are supposed to be held on by turning them while feeding a wire into a hole in the side like glands on some hydraulic cylinders. Internet says it's a fairly common way to hold them on mini ex drives of various brands, I think they might be KYB. The original drain plugs are missing and one hole had been re tapped for 3/8" NPT, the other three had a 5/8 NC set screw with a bunch of pipe tape on them. The planetaries are supposed to have 80w-90 but all I see is 00 grease when I looked in. I added an o-ring and nut to the set screw plugs and then filled them up with as much 80w-90 as I could, plugged the holes, ran the track for a few mins and repeated the filling until I couldn't get any more in. Each took about 8 oz of gear lube, I suspect they were pretty packed full of 00 grease so they didn't have much room. After setting for a few says I don't see any gear lube leaking out and the level is still where it should be. I am suspicious/hoping that the only reason they used grease is that they bugged up the OEM drain/fill holes trying to get the wire out and had to improvise plugs which wouldn't seal gear lube so they stuck their grease gun in a hole and gave'r. If there is a bad seal somewhere I think the grease is doing a good enough job keeping the oil in for now.
Regardless they seem to be working fine now, and adding gear lube can't hurt.
If they do start leaking badly, it appears china is pumping new final drives out cheap enough that I doubt I'd even mess with fixing the existing ones. Final drive with motor is $1800 on ebay, $1000 on alibaba.
2) Is there no way to grease any of the rollers or front idler? I pressurewashed the whole machine clean and couldn't find any way to lube them. I did find 3 remote mounted zerks on the house under the right foot area for swing bearing, back pin for the swing cylinder, and one for ???? but never found anything on the undercarraige aside from the tensioner zerks.
3) Cant find a free parts manual for this exact machine to see how it's put together. It has plumbing on the stick for a hydraulic thumb but I don't know how it would be controlled. The lines are capped instead of a QD. Almost all the labels are in japanese (has to be gray market), but I'm getting it figured out.