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Message: <blockquote data-quote="spitzair" data-source="post: 140970" data-attributes="member: 3333">How fast are you running your engine while all of this is going on? These machines will make all sorts of noise and feel weak if you're just running the engine at idle or lower RPM, they need to be revved up some. They will whine a bit with the engine running at higher rpm and that is normal but at low rpm they will sound very unhappy.  Also check your hydraulic fluid level. You say you just got it up and running, is this a new to you machine? If it's been sitting for some time or it's been all apart there could be air in they hydraulic system and that can take a bit of time to work itself out.Another thing, that pressure switch on your filter is there to warn you if the filter is getting plugged up and it will only turn on your warning light when the filter goes into bypass. It looks for a difference in pressure between the inlet and outlet side of your filter and once that pressure hits a certain value it will activate the switch. You may be able to test it by hooking a multimeter to it, one lead on the body and another to the screw on top and then compressing the spring, once compressed enough your ohm reading should drop from infinite to zero.</blockquote>