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Message: <blockquote data-quote="slonebuilt" data-source="post: 19602" data-attributes="member: 2131"><p>ok fellas removed switch and installed a press gauge. thi is the switch on the bottom (output )side of the filter maain housing. at 2280 rpms im gettin 145psi. am i checking the right spot. i really need a service manual but the cheapest i have found is 275$. when i unhooked this switch i noticed it stays running and nothing lights up telling me to stop. also talked to the original owner who happens to be a close friend of mine and i asked him if he ever changed the hydro fluid. he said no but it did blow a main hose once, which drained most of the system . and they put regular old hydro fluid like for a tractor, back in it . i guess they didnt know any different. im guessing it was 32w or close to that maybe a universal type fluid. would this b the root of the problem? the machine has always "whined" so to speak. if so what do i do to correct the problem. im going to try and change the fluid although im not quite sure where the drain is for the hydro tank. is there a chance that one of u guys could maybe e-mail me a copy of the hydro section of the service manual. im on a tight budget so buying one is out of the question. can it b downloaded from a particular site?</p></blockquote><p></p>