Multi-purpose hydraulic system

A hydraulic system comprising:

• a first pump, in fluid communication with a first valve;
• a second pump, in fluid communication with a second valve;
• an auxiliary passage, in downstream fluid communication with the first valve and the second valve;
• a check valve, in fluid communication between the second pump and the auxiliary passage;
• and
• a means for modifying flow to the auxiliary passage.

A power machine comprising:

• a frame;
• a plurality of ground engaging members supporting the frame;
• an engine operably connected to the ground engaging members;
• a first pump, operably connected to the engine, and in fluid communication via a first passage with a first valve that controls flow to a boom operably mounted on the frame;
• a second pump, operably connected to the engine, and in fluid communication via second passage with a second valve and a fourth valve, wherein the second valve controls flow to an arm operably mounted on the boom, and the fourth valve controls flow to an attachment operably mounted on the power machine;
• a third valve, in fluid communication via an auxiliary passage with the first passage, downstream of the first valve, and with the second passage, downstream of the second valve and the fourth valve;
• and
• an apparatus for providing various flow options to the third valve, the apparatus being in fluid communication with the second passage downstream of the second valve and the fourth valve and upstream of the auxiliary passage.