I'm assuming these are standard hydra-justers, as we called them. There should be what appears to be an inspection cover approx. 6" X 6", or so near the front of the cover, over the adjuster assy. Possibly a section of the cover over the barrel of the adjuster, that is removable. Under there, you will find a grease zerk. Give it a few shots at a time, then pull up, and back up a couple times, letting it take the slack out of the track. Then check the sag in the track, with a straight edge. Usually a good inch was pretty decent.
If you pump them up too tight. Under the zerk on what we had, looked to be a nut about 3/4" or 1" depending on the size of the tractor. Back this out slowly, and it will release grease, and tension off the track. Just go a bit a a time, until you see grease coming out.
Not really familiar with a Komatsu, but the Case, John Deere, and Fiat-Allis we had were pretty much the same in principle.