PUMP MOUNTING STRUCTURE

PROBLEM TO BE SOLVED: To maximally prevent the axis misalignment of a bearing which supports a rotary shaft while suppressing a pump itself from largely vibrating.SOLUTION: A second mounting leg 41b has a cylindrical mounting part 43. The mounting part 43 is inserted into an insertion recess 51 at a mounted surface Bd1 and internally has an insertion hole 42 into which a bolt B is inserted. A first clearance S1 is formed between the insertion hole 42 and the bolt B. A second clearance S2 is formed between the outer peripheral surface 43a of the mounting part 43 and the inner peripheral surface 51a of the insertion recess 51. Lubricating oil 60 is filled into the insertion recess 51. Furthermore, a seal member 48 is disposed at a part closer to the side of an opening of the insertion recess 51 than a region where the lubricating oil 60 is filled between the mounting part 43 and the insertion recess 51.