Hydraulic pump idle gear part press-fitting assembly and press-fitting method thereof

The invention discloses a hydraulic pump idle gear part press-fitting assembly and a press-fitting method thereof. The hydraulic pump idle gear part press-fitting assembly comprises a first positioning shaft which is a three-stepped shaft, a first press head in a shape of a Chinese character of 'ji' and provided with a fourth end face, an inner positioning circle, a fifth end face and a fourth outer positioning circle, a second positioning shaft which is a two-stepped shaft and provided with a first outer circle, a third end face, a third outer positioning circle and a fourth positioning circle, a cylindrical second press head, and a cushion block machined with a yielding hole in the center, wherein the outer circle of the second end face is greater than a bearing installing hole of an idle gear, the first outer circle is smaller than the bearing installing hole of the idle gear, and the yielding hole is used for yielding an idle gear shaft. The hydraulic pump idle gear part press-fitting assembly is accurate