It was the G ST (Salt Track) that had the split link and lubricated bushings. By now they have probably been replaced with a standard track.
The seal for the adjuster is like any oil or grease seal. Open end goes toward the grease. Taking one apart twice in one day sucks, don't ask how I know.
Now would be a good time to fill up the front idler hub. The G's used the same one on both sides, so the plug is in on one and out on the other.
Unless the tracks are 2 breaths away from shot, it is going to be a lot easier to knock out the master. Especially if you don't have a machine that can lift the rail to get it back into place.
What my uncle and I found worked best, was to make up something to hold a large bolt or piece of drive axle, and run the master down between two lower idlers to hold it.
Be sure to leave room to move the machine fore and aft. Once the pin is out, back up til the track is out of the way. Do the work, then pull back forward til the top is almost back on the idler. Lay a piece of broom handle or similar (make sure it's breakable, sometimes they don't come out) from the front idler to the top idler. Roll the front of the track up around and wedge a piece of your favorite 2X lumber against the blade to hold it up. Use a come-a-long or chain and binders to pull the ends together. The pin goes in easier than it comes out, but keeping the bushings in can be tricky.
Dad has a couple pieces of bar stock with threaded holes that stay in the toolbox. You put the bushings in place, with the bar stock 90 degrees to the link, then snug the bolts down through the pin hole. Once the links start to come together, you can remove the bolts and bar stock, and then the links hold the bushings in place and can be pulled on together.