Just as the title says, I'm looking for good part numbers for track pins & bushings. CAT or otherwise, I don't really care. Rails measure 3-7/16" tall, sprockets are worn, 4 roller track frame & solid front idler. It is missing 1 track roller that I'm going to have to replace. It has 18" track pads on it iirc. I intend on building up the worn components with weld to refurbish them. It gets fairly low usage during the year, but I'm tired of making sure I don't throw a track while I'm using it. 

I had Michigan CAT come out about about 6 or 7 years ago to assess the undercarriage. The gentleman told me that the rollers & front idler were still serviceable, but the pins & bushings were toast. The sprockets weren't far behind either. He gave me an estimate of 400-500 hours of service life left. I'm currently at that mark.

I do have some other ideas for 'improvements' & 'upgrades' for it, but I need to get the undercarriage sorted out first. Sorry if the photos aren't the best. It's what I currently have available on my phone. Any help is appreciated. 

Heck, the roller flanges and pin bosses are not even banging against each other. If your sprocket teeth are worn to the point where they would slip, personally I would just weld on some sprocket rims and call it good. Are your bushings eaten through? or just worn flat ? Unless you use it a lot, you could just run the UC beyond the limits and replace everything when absolutely zero life left. (just my opinion) How "Snakey" are the rails themselves? If you maintain tension and have good rock guards, that helps . JM

Some bushings are eaten through, others have a noticeable wear indentation in them. The driver side is missing one pin & bushing. It's being held together by a grade 8 bolt, it was like that when I bought it 11 years ago. The tensioners are trashed. Several years ago I tried massive amounts of heat & leverage for several days to adjust them. They just flat out wouldn't budge. I'm looking at buying some of the hydrajusters from Henderson mfg to replace them. I have no rock guards for this machine, although I may have found a cast set for sale. I'm trying to avoid trashing everything & then replace it all. I'd rather spend some money now, instead of a lot later. Not sure what you mean by 'snakey' rails? They seem to track fairly well, but there is noticeable wear on the sides of them.

Well since you have bushings warren through the old time way would be new pins and bushings. But I don't know how that works today. From comment on this board costs to much to put new lubricated pins and bushing in a rail today so the tooling to do those jobs is disappearing. Beside finding pins and bushing for a track as old as your.

Gauntjoh, yes, I did see those. Lots of good information in there! It at least gives some good numbers to go off of, which is half the battle. 

you can still buy inserts to weld into the sprockets also

Really? I was unaware of that. Do you have the contact information for who still makes & sells them? That's something I would be interested in.

Henderson still lists the track adjusters on their website - www.hendersonmfgco.com/
 

HV-4 is the seal part number. D8V is 4 roller, while D8SV is 5 roller. I just checked my old emails, and as of about 1 year ago they were $489 per side + tax/shipping. When did you check prices? Everything is going through the roof right now anyway.