A work vehicle capable of an autonomous travel includes a seat for a driver, a steering manipulator located in front of the seat and a display device configured to display information about the autonomous travel. The display device is located on one side in a left-right direction of the steering manipulator and includes a display that has a display screen configured to display information about the autonomous travel of the work vehicle and a manipulator connected to the display and having a manipulation member to enable operation associated with the autonomous travel.

A work vehicle includes an engine, a transmission to change a received rotational force to a rotational force at a gear ratio that corresponds to a desired vehicle speed and output the changed rotational force, a first operating tool to change the rotation speed of the engine and a deceleration rate of the transmission, a rotation speed controller to control the rotation speed of the engine based on an input provided to the first operating tool, and a second operating tool to receive a holding instruction to hold the rotation speed of the engine constant. In response to the holding instruction being inputted to the second operating tool, the rotation speed controller is configured or programmed to disable control of the rotation speed of the engine which control is based on the input provided to the first operating tool, and hold the rotation speed of the engine constant in accordance with the holding instruction.

An operation device of a work vehicle includes a position lever to set a height of a work device, a sensitivity adjustment lever to adjust an up/down sensitivity of the work device, and an up/down lever to selectively change a working state and a non-working state, the working state being a state in which the work device is positioned at the height set by the position lever, the non-working state being a state in which the work device is positioned above the set height. The up/down lever is located rearward of the position lever and the sensitivity adjustment lever.

To reduce complexity of operation when a working vehicle performs automatic steering, the working vehicle includes a vehicle body to be manually steered with a steering wheel or automatically steered to travel forward or rearward, an operator's seat on the vehicle body, a console located forward of the operator's seat or located on one side of the operator's seat, a first manual operator for automatic steering provided in or on the console, and a second manual operator for automatic steering attachable at a location rearward of the operator's seat.

A milling machine can include a frame; a rotor attached to the frame; vertically adjustable legs to raise and lower the rotor, each of the vertically adjustable legs with a track or wheel at a lower end to propel the milling machine; and a mechanism associated with at least one of the vertically adjustable legs to mechanically store and recall a leg height selected by an operator of the milling machine.

An operating mechanism of a work vehicle includes: an operating portion that is provided to a side console disposed beside a seat and can be operated by an operator; and a switching portion capable of switching between a used state in which the operating portion can be used and a non-used state in which the operating portion cannot be used.

A milling machine can include a frame; a rotor attached to the frame; vertically adjustable legs to raise and lower the rotor, each of the vertically adjustable legs with a track or wheel at a lower end to propel the milling machine; and a mechanism associated with at least one of the vertically adjustable legs to mechanically store and recall a leg height selected by an operator of the milling machine.

A work vehicle includes a link mechanism to be equipped with a work implement, a drive mechanism to drive the link mechanism to ascend and descend the work implement, and a control lever is to be operated to ascend and descend the work implement. The work vehicle includes a first displacement transmission mechanism, an additional operational mechanism, and a second displacement transmission mechanism. The first displacement transmission mechanism links the drive mechanism and the control lever to transmit a displacement of the control lever to the drive mechanism. The additional operational mechanism is configured to operate the control lever at a location apart from a position of the control lever. The second displacement transmission mechanism mechanically links the additional operational mechanism and the control lever without interposing the first displacement transmission mechanism to shift the control lever in accordance with an operation of the additional operational mechanism.

A direction adjusting device for mounting to a steering system of a driving body includes a driving element and a linkage element. The driving element includes a fitting housing and a driving main body, the fitting housing has an accommodation space, the driving main body has a transmission channel, the driving main body is installed in the accommodation space of the fitting housing, and the transmission channel of the driving main body communicates with the accommodation space of the fitting housing. The linkage element is installed in the transmission channel, the driving main body is capable of for driving the linkage element to rotate, and the linkage element is installed on the steering system of the driving main body.

A fork-arm lift tractor includes a vehicle body, a supporting plate disposed above the vehicle body, a lifting device for driving the supporting plate to be lifted, a front and rear fork-arm assemblies, a front and rear fork-arm drive assemblies. The front fork-arm assembly includes two front fork-arms rotatably disposed at the supporting plate. The rear fork-arm assembly includes two rear fork-arms rotatably disposed at the supporting plate, and the front and rear fork-arms may be deployed or retracted from both sides of the supporting plate. The front fork-arm driving assembly includes a front transmission part, and a front power device disposed at the supporting plate and may drive the front transmission part to move horizontally linearly so as to rotate the two front fork-arms. The rear fork-arm driving assembly has almost the same structure of the front fork-arm driving assembly and is used to rotate the two rear fork-arms.