The crankshaft may have failed from metal fatigue. I would have the block magna-fluxed and another used crankshaft. We had a brand new crankshaft to break in a new engine. It was from a military vehicle and we were running it on a stationary dynamometer. I was on the midnight shift and the engine made a terrible noise and the scale reading on the dynamometer was vibrating bad. I shut the engine down and called the project engineer at home. He said to standby until he arrived.
When he arrived he wanted to hear the engine noise so I stared the engine and he said to shut it down, but it took awhile since the dynamometer kept spinning the engine. We took an oil sample and pulled the engine off the test stand after disconnecting all the instrumentation. Dropped the oil pan and found the crankshaft had broken in the counterweight. The dayshift installed a new shaft and the second shift installed the engine on the test stand. The test continued when my shift started and we had no more failures. Hal
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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