It sure wont hurt to change both at 100 hrs. That was a guess on the oil bath, but they dont do as good a job as a paper element, particularly on diesels. Then too, most people change their paper elements too often and dont change oil baths often enough. I've seen crud a half inch deep in some after a day of rolling dusty red clover hay.
Those 1210's and 990's were always my favorite tractors of all. I just love em. One of the quirks I learned in working on them was they really dislike dirty oil in the pan. All the DB engines would eat up cranks if you didnt keep the oil changed really regular. Never seen cranks like the DB's use in anything else. Really precision ground and without counter weights. Lots of guys here bought into the idea of stretching out oil change intervals with synthetics. I've done 22 or 23 bottom end rebuilds on them with the cranks and mains scratched beyond repair and all but 3 were long drain intervals (those were no oil in the pan rebuilds, lol.)
At 4000 hours that sounds like a nice low hour machine. I'd love to see some pics sometime.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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