I have a 1989 F250 regular cab and a Western plow, I do not know how old it is though. When I plow the plow just lays down flat. Like when you hit a curb and the plow goes forward but it dose it all the time. It is not that the snow is to heavy because the snow was only 3”. I just put new leaf springs on the front of my truck. The plow worked fine last year so I don’t know what is wrong so if you guys could help me out I would highly appreciate it, thanks.