I have a 7 1/2 Western Pro plow/Unimount. At the moment it doesn't want to angle either way. It raises and lowers fine. It will angle a tiny bit maybe an inch at the most. This has been an intermittent problem. Usually I can keep working the joystick back and forth and it will come out of it. I have went over all the connections, they are clean and tight. Put dielectric grease on the plug in connectors. I'm thinking the fluid may be contaminated, and possibly froze. I bought the plow used this year and never flushed the system. My question is which plug is the filler plug? On top of the pump there is a sticker which says to change the fluid annually. There is a screw by the sticker which accepts an allen wrench. Is that the right one? Also where is the strainer at? Is it under that screw? After doing a search I saw a thread talking about the Western system. I don't want to start turning the wrong screw and change the pressure or anything. I guess I really need to pick up a manual for the plow. But the forecast is calling for snow, and I need to figure out which plug is the right one as soon as possible.