The main thing that stress the head is not allowing the engine to warm up before using it and not allowing it to cool down long enough before shutting down . And always shut down on the diesel side . Switching back to gas only heats the head back up. Now as to how much to twist the screw do it a half turn at a time till ya feel your comfortable with the set . When i had my 450 D i had put center punch marks on the threads for several different settings and this was done while the pump was on the pump stand . I ran mine at around 75-80 Hp. for farming and for the pulls it was backed way out . Yea she did smoke while plowing as one neighbor said he knew how many rounds we had made in the field on a still day by the rings of smoke hanging in the air.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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