Patent ID: 7788919

Claim:
A pump unit including first and second hydraulic pumps and disposed away from first and second hydraulic motors with which the first and second hydraulic pumps are fluidly connected, comprising: a housing enclosing the first and second hydraulic pumps and formed with an opening that has a size allowing the first and second hydraulic pumps to pass therethrough, and a center section detachably connected to the pump case so as to close the opening, wherein the center section includes a first end surface which connects to the housing and with which the first and second hydraulic pumps are brought into contact in a rotatable manner, a second end surface facing in a direction opposite to the first end surface, first to fourth side surfaces extending between corresponding side edges of the first and second end surfaces, the first and second side surfaces facing in an opposite direction from each other, and the third and fourth side surfaces facing in an opposite direction from each other, the center section is provided with a first pair of inlet/outlet passages that have first ends fluidly connected with the first hydraulic pump and second ends opened to the outside of the center section to form a pair of first connection ports connectable to the first hydraulic motor, and a second pair of inlet/outlet passages that have first ends fluidly connected with the second hydraulic pump and second ends opened to the outside of the center section to form a pair of second connection ports connectable to the second hydraulic motors, and the pair of first connection ports are opened at the first side surface of the center section, and the pair of second connection ports are opened at the second side surface of the center section.