Patent ID: 7708104

Claim:
A hydraulic pump set provided with first and second hydraulic pump units operatively driven by a driving source and arranged approximately symmetrical with respect to each other with a reference plane interposed therebetween, said hydraulic pump set comprising: a pair of common pump bodies; first and second port blocks capable of supporting said corresponding common pump body; first and second pump shafts each having an input end operatively connected to said driving source, said first and second pump shafts rotatably driving said corresponding common pump body; and a pair of common pump cases removably connected to said first and second port blocks, respectively, so as to accommodate said corresponding common pump body, said pair of common pump cases including an asymmetrical connected part with an axis line of said corresponding pump shaft as a reference, wherein said first port block configuring said first hydraulic pump unit includes a first connecting part capable of connecting to said connected part of said common pump case only when the common pump case is positioned at a first relative position about the pump shaft in the case of being directed in a specific direction, and said second port block configuring said second hydraulic pump unit includes a second connecting part capable of connecting to said connected part of said common pump case only when the common pump case is positioned at a second relative position about the pump shaft in the case of being directed in the same direction as said first port block.