On our larger diesel tractors (886 on up) we would go 200 hours for oil and filters. In the winter we backed it down to 150 hours. Still changing the oil 4-10 times a year depending on the tractor. We also used Archer synthetic oil. When our 1486 was tore down for an overhaul it's main bearings were still in factory spec - the pistons and cylinder walls showed "some" wear but nowhere near what they were used to seeing on a tractor with 10,000 hours. The 886 we had was overhauled twice - the first time the shop said it was almost a waste of time and money, the second time it had broken rings and the crank had to be ground - not bad for 20,000 hours plus of hard use.
The big V8 in our 4768 was only run 150 hours between oil changes - we were warned it wasn't going to stand up as well as the I6 engines. We traded it at 11,000 hours - the engine had never been cracked open and it ran "ok".
Never had a failure due to lubricant and we usually ran 10,000 hours between overhauls.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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