Patent ID: 7431101

Claim:
A hydraulic system for operating hydraulic functions of plow/spreader type equipment comprising: a) a reservoir means for hydraulic fluid; b) a load sensitive variable displacement pump means for pumping hydraulic fluid from the reservoir; and c) a plow on/off valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the plow valve means including: i) a manifold means having a fluid channel coupled to the plow valve means pressure port and further having a number of return ports; ii) one or more on/off valve means coupled to the manifold means return ports, each valve means being adapted to control fluid flow therein to operate a respective component of the plow equipment; and iii) a stroke valve means coupled to a manifold means return port, the stroke valve means being adapted to operate in conjunction with one or more of the on/off valve means for providing a load sensing pressure signal to the pump means.