Abstract: A hydraulic system incorporating a modified spool controlling hydraulic fluid flow to non-load sensing functions for use with a load-sensing pump is described. The hydraulic system comprises a hydraulically piloted stroke valve for providing a load sensing signal to the load-sensing pump when the non-load sensing functions are operated.

Abstract: A versatile load sensing hydraulic system capable of being adapted to a variety of possible configurations for vehicle mounted implements such as plow/spreader type vehicles or the like is disclosed. An embodiment of the hydraulic system comprises a reservoir for hydraulic fluid; a load sensitive variable displacement pump for pumping hydraulic fluid from the reservoir; and a plow on/off valve having a pressure port coupled to the pump for receiving hydraulic fluid under pressure. The plow valve includes a manifold having a fluid channel coupled to the plow valve pressure port and further having a number of return ports; one or more on/off valve coupled to the manifold return ports, each valve being adapted to control fluid flow therein to operate a respective component of the plow equipment; and a stroke valve coupled to a manifold return port, the stroke valve being adapted to operate in conjunction with one or more of the on/off valve for providing a load sensing pressure signal to the pump.

Abstract: A versatile load sensing hydraulic system capable of being adapted to a variety of possible configurations for vehicle mounted implements such as plow/spreader type vehicles or the like is disclosed. An embodiment of the hydraulic system comprises a reservoir means for hydraulic fluid; a load sensitive variable displacement pump means for pumping hydraulic fluid from the reservoir; and a plow on/off valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure.