RTV 1100 Plow Hydraulic Problems

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I own a 2008 Kubota RTV1100 with A Karlan hydraulic V plow. The plow hydraulics do not work. When I push the buttons on the selector switch nothing happens. The plow will not raise , lower of the sides move in and out. Have looked over the system and do not have any leaks or issues. Anyone have any ideas on how to trouble shoot thie problem. I do not have the manuals as I bought RTV and Plow as a combo used.

Questions let me know.

Scott