Work vehicle

A work vehicle, comprising:

• a gear transmission configured to vary power from a power source and output the varied power;
• a differential mechanism including a ring gear rotatable around a rotation axis along a horizontal direction, the differential mechanism being configured to transmit the power inputted from the gear transmission to a traveling device;
• a transmission case containing the gear transmission and the differential mechanism;
• a first space zone as part of an internal space of the transmission case in which first space zone the differential mechanism is located;
• a second space zone as part of the internal space which the second space zone is adjacent to the first space zone;
• a partition wall separating the first space zone and the second space zone;
• an upper space disposed above the partition wall and configured to allow lubricating oil scooped up from the first space zone by rotation of the ring gear to flow in the second space zone;
• a flow-out path disposed below the upper space and configured to allow the lubricating oil staying in the second space zone to flow out to the first space zone;
• an area adjustment part configured to adjust a circulation area of the flow-out path;
• and
• a wall adjustment part configured to adjust lifting and lowering of an upper portion of the partition wall.