Posted by Blue_Tractor_Man on October 18, 2010 at 12:54:31 from (66.193.226.74):
I have three (3) Kubota ZB600 two cylinder 12 HP diesel water cooled engines driving agricultural spray pumps. It seems that once or twice each season the engines get hard to start and begin puffing a little white smoke. The compression drops. It is always the valve clearance and it seems to only affect the intake valves. We open the valve clearance back up and the problem goes away.
What would cause these little engines to lose valve clearance? Could it be the ULS diesel? Do you think these engines have hardened valve seats? They stopped making them about 4 years ago.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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