Well, Gene , I agree with you having rebuilt pumps at Stanadyne shop in St. Louis MI for a while. That test machine a lot of times showed you just how far off the pump was. One thing about just leaving adjustments alone or trying to duplicate the way it was is that most of these pumps have already been into two or three times and by who or what nobody knows. My advice would be to at least pay them to put it on the test stand and set everything properly. We had a guy that had done these for over 40 yrs that came in for parts and would go to the customers place and install them and run them and he had done enough that he adjusted them by ear. He may have even added a few secrets to make them a little better for a certain situation. Problem with not having them on a test stand is that you may have some other malfunctioning item on the tractor also and when it doesn't run exactly right after your rebuild then you are doing a guessing game. Was the pump right or some other problem also. At least if it is tested then you know to look elsewhere if it still doesn't run just right. Minute adjustments on the test stand make a lot of difference in performance at all rpm and load conditions.
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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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