The most critical item that requires break in is a flat tappet cam. They usually come with assembly grease, or a recommended grease to apply to the lifters and cam lobes. In addition, a diesel oil with zinc additive is helpful.
What a new cam and lifters does not like is extended cranking, running dry and no oil pressure until the galleys fill, and idling!
Prime the oil system, set the timing, check the spark and fuel, have it ready to bust off ASAP, and bring the RPM up, typically full governed speed on a tractor engine.
Of course you want to watch the oil pressure, temp, leaks, listen, make sure the rockers are oiling, etc., but try to keep the RPM up for at least 20 to 30 minutes. Then shut it down, retorque the head bolts, check the valve lash.
Once it goes to work, try not to fully load it for extended time until the rings have time to seat, avoid idling. The break in oil needs to stay in by the mfg recommendation, or about 1/2 the normal oil change period.
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Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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