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Message: <blockquote data-quote="Quill" data-source="post: 138312" data-attributes="member: 25715">I have a used Bobcat S175 that needs hydraulic / hydrostatic fluid. The manual states that this model can use VG 100, VG 46, some Bobcat product (and presumably some newer Bobcat product that replaced that other Bobcat product). I have no clue what the previous owner used, though I found out they changed the engine coolant from PG-based to EG-based despite what the manual states -- i.e. clearly previous owner was not not a strict manual adherent.Given that there is no information about what's currently in the machine, what are my options? I suspect I'm going to hear that I need to drain/flush, replace filter, and refill with ~5 gallons of fresh hydraulic fluid. I'm hoping there might be a simpler/far less expensive approach where I could just top it off with something.</blockquote>