No, the 1010 didn't have valve-seat inserts. Valve seats were ground into the head casting. The 1010 DOES have exhaust valve rotators.
The new engine that followed in the 350 also did not have any seat-inserts. That was the Dubuque/Manheim 300 series engine. 3 banger in the 350 and 1020, 4 banger in the 2510, 2020, 450, etc. 6 banger in a 540 skidder, 4030 tractor, etc. I don't recall seeing factory seat inserts in any of them until turbos came out - or French built (Saran) engines were used.
As I recall, it was the Deere Waterloo engines that first appeared with seat-inserts but maybe somebody will correct me.
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Today's Featured Article - A Lifetime of David Brown Tractors - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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