It's been a long time since I worked on one of these, but i Remember it was like working on a 99 sportsman 500 once you got to the engine. I don't remember exactly where the pump is, but here is a video I found that shows how to on an ATV.
Good luck. I do remember having a few choice words about Polaris engineers because of how I had to take this machine apart to fix anything on the engine. @don there is a reference to the filter there too.