Normal operating temperature is 100 degrees over ambient temperature. Anything above that would be concidered hot. If the system is indeed running hot then the system is staying on high pressure. The unloading valve is suppose to dump oil back to the sump when you are not using your hydraulics to prevent the oil from getting hot. Hot oil is thin and easier to slip by the gears from the high pressure side of the pump to the low pressure side. Does it sound like the engine is laboring all the time like you are constantly using the hydraulic system. Sometimes the tel-a-depth valve spool will hang up in the valve and not return to neutral and keep the system on high pressure. If you have weak hydraulics to the auxillary valve only then you need to check for a blown o ring on the check valve piston. Chuck
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Today's Featured Article - Talk of the Town: Best Tractor? - by Staff. This recent discussion on the Tractor Talk discussion board here at the on-line magazine drew quite a bit of response. We see the question of "Which tractor is best for me?" asked quite often. We thought you might find the responses interesting. As always, the names of the people participating in the discussion have been left out - we did not request their permission to reprint their names in this article. However you can find this discussion in it's entirety in the Tractor Talk archives.
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