Posted by paul on October 30, 2007 at 19:37:16 from (66.44.132.218):
In Reply to: live hydraulics posted by Jim W. on October 30, 2007 at 08:54:31:
You will likely have live hydraulics on that tractor. It means you can run the hydraulics if you do (or do not) have the clutch pushed in.
The first tractors drove everything from the rear end, after the clutch. This meant if you pushed in the clutch, the hyd pump would stop. They quickly realized this wasn't good, & drove the hyd pumps from a shaft in front of the clutch.
A related issue is live pto - same concept, but it took longer for tractors to get live pto. Was harder to get a live shaft to the back of the tractor....
As someone said, open center vs closed center may be an issue that comes up. JD liked to use closed center, not sure if they did on your model. It affects the types of hyd controls you can add to your tractor. Open center flows oil all the time, unless you move a lever & block the flow, diverting the oil to move your cylinder. Closed center has constant pressure, but only flows oil when it is needed by opening a lever.
Oil - your manual will list a specification that the oil has to meet. You have 3 options; JD brand oil which is more spendy, but some feel they get a better oil going with the OEM; an oil from a fleet & farm supply store that is designed for JD specs; or the same source of oil that is called 'universal' oil and lists in fine print many brands of oil that it is cvompatable with.
Since I have 3-4 brands of tractors & combine, I tend yo get the universal oil that is compatable with many things.
There is universal hydraulic oil, and there is universal tans/hydraulic oil. Big difference in them, many tractors use the rear end gear oil for the hyd sump, and the oil _must_ be good enough to lube those rear end gears. I try to always get the better grade trans/hyd oil so I don't goof & put the straight hyd oil in a gearcase.....
So, you can go to JD for oil, or you can shop at any farm supply store and get a compatable trans/hyd oil.
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