The blade on my snow plow is stuck in an angle to the left. When I move the controller (joystick) to the right, the pump turns on but the plow blade doesn't move. The plow does move up and down. I'm wondering if it is likely that the hydraulic cylinders (rams) that angle the plow's blade have water in them and it's frozen? Any ideas? Old Western 7ft plow (~1980), cable controlled.