Valve manifold

A hydraulic system comprising:

• a first valve including a first valve member and a second valve member, the second valve member axially slidable with respect to the first member against a biasing member and between an open position and a closed position, and the first valve member at least partially defining a fluid supply passage, the first valve member having a first plurality of orifices distributed about a circumference thereof, the second valve member having a second plurality of orifices distributed about a circumference thereof, wherein the first and second plurality of orifices are fluidly disconnected at the closed position and fluidly connected at the open position;
• a second valve fluidly connected to the first valve, the second valve selectively communicating pressurized fluid to the first valve to urge the second valve to the open position;
• a pump including a pump input shaft and a pump outlet, where at least a portion of the input shaft extends into the fluid supply passage and the pump outlet is in fluid communication with the fluid supply passage;
• and
• a check valve disposed in a pilot manifold that fluidly communicates from an outlet of the first valve member to the second valve, for controlling an amount of fluid delivered to the second valve from the first valve member to control a flow of pressurized fluid to the pilot manifold and to prevent fluid from back flowing from the pilot manifold to the first valve member.

A valve manifold, comprising:

• a first valve having a first member and a second member, wherein the second member is slidable along a central axis between a first axial position and a second axial position such that, when in the first position, a first set of openings about its circumference in the first member is at least partially aligned with a second set of openings about its circumference in the second member, wherein the first and second sets of openings are fluidly disconnected at the first axial position and fluidly connected at the second axial position;
• a second valve fluidly connected to the first valve to cause the second member to move from the first axial position to the second axial position when a pressurized fluid passes from the second valve to the second member;
• a pilot manifold for providing the pressurized fluid to the second valve via a pilot supply passage from a supply passage;
• and
• a check valve disposed in the pilot manifold that fluidly communicates from an outlet of the first valve member to the second valve, for controlling an amount of fluid delivered to the second valve from the first member and to prevent fluid from back flowing from the pilot manifold to the first member.