You may be correct on the exact method of control. It's a long time since I looked at Deere pump theory specifically... I tend to think more in terms of axial piston pumps rather than radial pumps... and swash plate control in a standard CC axial setup... the pump is normally in stroke whereas in a CCLS setup the pump is normally de-stroked. Regardless, I still don't see why the radial pump can't operate in an open center system. That pump is still normally 'in stroke' unless it reaches high stand-by. All you're doing is limiting it's ability to reach high stand-by because there's nothing for it to build pressure against so it never de-strokes. I see no reason for it to cavitate as long as it's got sufficient charge flow. I don't see it working without a pressurised charge flow tho... unlike an axial piston pump which in most cases can operate without charge pressure from a static source.
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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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