Patent ID: 7374010

Claim:
A housing for accommodating a hydraulic pump and a hydraulic motor that form an HST and supporting a pump shaft and a motor shaft that respectively support the hydraulic pump and the hydraulic motor, comprising: a body having an upstream side and a downstream side in a power transmission direction, the upstream side being connected directly or via an attaching bracket to an engine having an output shaft to which a flywheel body is connected, the downstream side being configured so that a center section forming a pair of hydraulic lines for fluidly communicating between the hydraulic pump and the hydraulic motor is connected thereto; and a partition wall dividing the body into a dry chamber which is on an upstream side in the power transmission direction and in which the flywheel body is positioned and a hydraulic fluid chamber which is on a downstream side in the power transmission direction and in which the hydraulic pump and the hydraulic motor are positioned, the hydraulic fluid chamber being capable of storing operating fluid for the HST in cooperation with the center section, wherein the partition wall supports the pump shaft, the motor shaft and a PTO shaft in cooperation with the center section, and the hydraulic fluid chamber accommodates, in addition to the hydraulic pump and the hydraulic motor, a transmission gear for operatively connecting the pump shaft and the PTO shaft, and a PTO hydraulic clutch unit supported by the PTO shaft so as to perform engagement or disengagement of the power transmission from the pump shaft to the PTO shaft.