Posted by Bob Bancroft on May 01, 2016 at 13:01:03 from (67.142.162.20):
In Reply to: Dropped valve posted by big tee on May 01, 2016 at 11:37:18:
I was cruising along, in a big field for here(41 acres) nearly done chisel plowing it with my old Steiger, with a Cummins VT903, when all of a sudden it started shuddering, and lost power. No bad, loud noises! So, I limped it home. (Seemed like it took the rest of the day to get the little old mounted chisel on the 4020 and finish up!) I guessed at the cold cylinder, and took that head off. The top of a valve had dropped off, pounded on the piston a few times, and was stuck back up in its home seat, upside down! I considered not changing the piston. But even though the top of the piston was very thick, under one deeper mark, you could just make out a fracture on the underside of the piston. Had the head overhauled. Installed new piston. Then the next winter had the other head done.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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