The two pumps are mounted piggy back and draw oil from same source and the main large suction tube in rear draws from bottom of case. However, that hose coming down from the top goes right back into that suction tube also as it is return oil from valves. It's purpose is to reduce cavitation, in other words , makes it easier for pumps to pull oil from rear frame. Any leaks in hose or looseness of pipe hose is connected to on top will cause air suction leaks.I should have mentioned also that there is an o-ring between trans housings where suction tube goes through and it can leak also.
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Today's Featured Article - Tractor Generators - by Chris Pratt. As a companion to the articles on three-brush and two-brush generators, it seemed fitting that we should provide our readers with a description of how a generator works in lay terms. The difficulty with all those "theory of operation" texts is that they border on principles of electricity or physics and such. Since I know nothing of either, you will have to put up with looking at the common sense side of how generators work which means we "
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