[doodlebug]

One thing to consider, the newer John Deere excavator's with "Power Wise" do speed up and slow down depending on hydraulic load. Sound's weird to hear them speed up under heavier load, maybe 2-300 rpm. My neighbor has a 160 Deere, that doe's it. And yes this is separate from the "auto idle" function.
Later, Neil#2 aka doodlebug.