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Posted by D. M. on Monday, March 31, 2014:

In Reply to: NAA Knocking Update posted by Michael Lacey on Friday, November 01, 2013:

My NAA starts up and runs fine but clatters when you go to shut it down. Also, it will run for about 15 minutes at 50 psi oil and then the oil pressure drops and the tractor will lose power. . The oil was changed and a snap ring was found in the oil pan. Rod bearings were replaced at that time but the noise persists when throttling down. I presume the oil is getting hot and leaking somewhere causing the pressure drop but I haven't noticed any smoking out of the exhaust. Appreciate any ideas of where to start looking next.

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