Axial piston pump mounting flange configuration

A hydraulic pump or motor (48, 100) includes a mounting flange (78) disposed at a first end of a housing (102). The mounting flange (78) defines a pair of fastener receiving holes (80, 92) disposed on either side of the shaft (104) along the X-axis. The pair of fastener receiving holes (80) each define a radius center (82) spaced apart from each other by a dimension X (84), and the guide protrusion (86) extends longitudinally away from the mounting flange (78), thereby defining a guide protrusion diameter (88). The ratio of the X dimension (84) to the guide protrusion diameter (88) is in the range of 1.07 to 1.11. 液压泵或马达(48，100)包括设置在壳体(102)的第一端处的安装凸缘(78)。安装凸缘(78)限定一对紧固件接收孔(80，92)，该紧固件接收孔沿着X轴线被设置在轴(104)的任一侧上。这对紧固件接收孔(80)各自限定半径中心(82)，该半径中心彼此间隔X尺寸(84)，并且导向突起部(86)远离安装凸缘(78)纵向延伸，从而限定导向突起部直径(88)。X尺寸(84)与导向突起部直径(88)的比率在1.07到1.11的范围内。