Posted by willie in mn on October 26, 2016 at 17:44:02 from (72.173.74.170):
In Reply to: 2 Stroke Diesels posted by JimS on October 26, 2016 at 09:37:08:
Drove many Detroit 2 cycle engines during my stint in the stage coaches. Mostly 8v71, a few 6v92, & some 8v92turbo. Had in-house machinist who did all the rebuilding. At around 700k miles they would start to smoke, swap out for one of Tommy's rebuilds, put back in the lineup. His rebuilds never leaked oil. Always neat to watch him test fire a fresh rebuild. Roll it out of the shop on a pallet, hook up temporary battery, fuel, radiator, & muffler. Charge the fuel tank with air, hit the starter, & listen to it purr. He would let it warm up at idle, listen for unfriendly noises, then grab rack & open it up. If no parts went flying he would say, sounds like another good one, ready to go. Usually when doing engine change, they would tie one up for a couple days, go through radiators, tires, brakes etc. then put it on the line, head south, turn around at El Paso or Laredo & head home to Mpls. Drivers slide seats at relay points. In a rush could swap engines in 4 hours. Told me that in his 25+ years of building engines, only had one run away, stuck injector held the rack open. We considered anything with under 300k miles as a fresh engine. There was one hill climbing out of river valley in Wi, 9% grade, hard second gear pull with a 8v71. Got chance to use a new demo in 92, with Cummins 11 liter. Hit the bottom of the hill at 20 mph, whipped the horses & let her go. Topped the hill at 55-60 mph.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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