If your using the rear hydraulic hook up they dump to the sump and the charge pump has to push all the oil back to the main hydraulic pump.
When I am putting a loader on a JD tractor like yours I plumb the hydraulics to where they return the oil to the filter cup. This oil then goes directly to the main hydraulic pump with out the charge pump having to pump all of it. You need an external close center valve to do this. You can not sue the rear selective control valves. I also usually plumb the supply form a tee fitting in the rock shaft supply line. This frees up the rear outlets for other use.
I opened my email. So you can email me and we can talk directly then.
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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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