I just purchased a 2008 JCB 8060 Excavator. Everything seemed normal when testing it out. After having it shipped 600 miles to my house I have started to notice a noise. After it is running for a short time I get a humming/buzzing noise that seems to come from under the floorboard. The tone seems to change a bit when moving the controls including the boom, arm, tracks, etc., but the machine appears to function normally.
Here is a video of the machine at idle:
Here is a video of the machine at idle: