Valve stack having a pattern switching valve

A valve stack for a work machine having a first hydraulic actuator, a second hydraulic actuator, a first operator control device, and a second operator control device, the valve stack comprising:

• a first valve body having a first mounting surface and a second mounting surface;
• a first valve member disposed within the first valve body and movable to control operation of the first hydraulic actuator;
• a second valve body having a first mounting surface configured to engage the first mounting surface of the first valve body, and a second mounting surface;
• a second valve member disposed within the second valve body and moveable to control operation of the second hydraulic actuator;
• a third valve body having a mounting surface configured to engage the second mounting surfaces of the first and second valve bodies;
• a third valve member disposed within the third valve body, in fluid communication with the first and second operator control devices and the first and second valve members;
• and
• a fourth valve member disposed within the third valve body, in fluid communication with the first and second operator control devices and the first and second valve members,
• wherein the third and fourth valve members are movable between first positions at which movement of the first operator control device corresponds to movement of the first valve member and movement of the second operator control device corresponds to movement of the second valve member, and second positions at which movement of the first operator control device corresponds to movement of the second valve member and movement of the second operator control device corresponds to movement of the first valve member.

A work machine, comprising:

• a first hydraulic actuator configured to move a boom of the work machine;
• a second hydraulic actuator configured to move a stick of the work machine;
• a first operator control device;
• a second operator control device;
• and
• a valve stack including:
• a first valve body having a first mounting surface and a second mounting surface;
• a first valve member disposed within the first valve body and configured to control movement of the boom;
• a second valve body having a first mounting surface configured to engage the first mounting surface of the first valve body, and a second mounting surface;
• a second valve member disposed within the second valve body and configured to control movement of the stick;
• a third valve body having a mounting surface configured to engage the second mounting surfaces of the first and second valve bodies;
• a third valve member disposed within the third valve body, the third valve member being in fluid communication with the first and second operator control devices and the first and second valve members;
• and
• a fourth valve member disposed within the third valve body, the fourth valve member being in fluid communication with the first and second operator control devices and first and second valve members,
• wherein the third and fourth valve members are movable between first positions at which movement of the first operator control device corresponds to movement of the first valve member and movement of the second operator control device corresponds to movement of the second valve member, and second positions at which movement of the first operator control device corresponds to movement of the second valve member and movement of the second operator control device corresponds to movement of the first valve member.