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Not sure if you are talking about a late model or 20 years old. I know on the older cat's there are fittings on the rollers, carrier rollers, idler and sprockets for filling with an Alemite or similar volume pump, using an 00 or similar grade tacky kind of grease, reminds me of chainsaw bar oil in consistency. The newer ones, most if not all these components are sealed and lubed at the factory, at least the major manufacturers I'm aware of are, especially undercarriage components. Being attentive always helps, keeping an eye on the tracks if possible, hard to watch while you are working. I the undercarriage is like new as mentioned, then you should have plenty of space left on the adjuster, that is always a plus. Keep your tracks adjusted per the Mfr.'s instructions, my old cats are 1 1/2" - 2" above the carrier rollers, give or take. Not too tight, that will cause excessive wear, too loose the same, and will be easier to roll a track off.b In the snow, the sprockets can pack with snow, and make the tracks tight, can run them looser than normal in deep snow. If the tracks are adjusted, chances are it will be hard to toss one. Working on the sides of hills, muck, both while turning will always find a loose track for you, especially the muck. Making harsh turns on uneven ground will throw one too, working on sidehills and uneven ground does increase the wear factor. Backin up while turning hard can also find a loose track, it slackens up while backing sometimes and can walk off the idler. You probably have a grease type adjuster, you pump grease in per the MFR's instructions, should also be a way to relieve the pressure, to loosen them as well.
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