Oil pump mounting structure

A mounting structure for mounting a separate shaft type oil pump in a case of a transmission, wherein the separate shaft type oil pump is driven by a shaft that is separate from and rotated in cooperation with a shaft arranged along a torque input route extending from an engine to the transmission to supply hydraulic oil to a transmission oil pressure control mechanism, the mounting structure comprising:

• a spacer coupler that fastens the oil pump to the transmission case, the spacer coupler including a plurality of spacers that couple the oil pump and the transmission case;
• an oil passage formed in the spacers of the spacer coupler to connect an oil pressure system, which includes the oil pressure control mechanism, and the oil pump;
• a manual shaft for operating the transmission, arranged in a clearance between the spacers of the spacer coupler;
• and
• wherein the spacers of the spacer coupler are separated from each other to form the clearance allowing for arrangement of the manual shaft between the spacers.