Sorry I did overlook the word "designed" which brings up another question.
The 1st Mannheim built tractors that were sold by JD dealers in USA were open center not closed center. So are you stating JD closed center hyd system is a solely Mannhiem engineered not Dubuque engineered as I never heard of that before??? The Mannhiem models 310,510 & 710 had OC gear hyd pumps not CC piston pumps. The 1st JD CC built in Manheim for European sales were built after the 1020/2020 CC tractors built in Dubuque.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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