Work vehicle

A work vehicle comprising:

• an engine installed in a traveling machine body supported by a traveling unit;
• and
• a transmission case incorporating a hydraulic continuously variable transmission configured to shift driving force from the engine,
• wherein the transmission case incorporates a forward/backward traveling switching mechanism configured to switch an output from the hydraulic continuously variable transmission between normal rotation and reverse rotation directions,
• wherein the engine is installed in a front portion of a frame member forming the traveling machine body,
• wherein the transmission case is coupled to a rear portion of the frame member,
• wherein the engine and the transmission case are coupled to each other in a driving-force transmittable manner via a driving force transmission shaft,
• wherein the work vehicle further comprises:
• a forward traveling valve for a forward traveling hydraulic clutch configured to enable and disable a normal rotation output transmitted toward the traveling unit;
• a backward traveling valve for a backward traveling hydraulic clutch configured to enable and disable a reverse rotation output transmitted toward the traveling unit;
• and
• a master valve configured to control hydraulic oil supplying to the forward traveling valve and the backward traveling valve,
• wherein a part of a hydraulic circuit establishing connection between a hydraulic pressure source and the hydraulic clutches is formed on a front lid member that is detachably attached to close a front surface opening of the transmission case, and
• wherein the forward traveling valve, the backward traveling valve, and the master valve are attached on a front surface side of the front lid member.