A front loader includes a boom, a first pivotal shaft disposed on a tip portion of the boom, a bucket supported by the first pivotal shaft to be capable of performing a shoveling movement and a dumping movement, a boom cylinder to swing the boom, a bucket cylinder to move the bucket to make the bucket perform the shoveling movement and the dumping movement, a control valve to be switched to any one of a first state supplying an operation fluid to the bucket cylinder and a second state stopping supplying the operation fluid to the bucket cylinder, a first movable member to turn around the first pivotal shaft in accordance with the movement of the bucket, and a wire connecting the first movable member to the control valve.

A front loader includes a boom, a first pivotal shaft disposed on a tip portion of the boom, a bucket supported by the first pivotal shaft to be capable of performing a shoveling movement and a dumping movement, a boom cylinder to swing the boom, a bucket cylinder to move the bucket to make the bucket perform the shoveling movement and the dumping movement, a control valve to be switched to any one of a first state supplying an operation fluid to the bucket cylinder and a second state stopping supplying the operation fluid to the bucket cylinder, a first movable member to turn around the first pivotal shaft in accordance with the movement of the bucket, and a wire connecting the first movable member to the control valve.

The invention relates to a front loader (10) comprising: at least one fastening arrangement (12) connectable to a working vehicle (1); at least one loader arm (20) with a first part (21) and a second part (22) connected via a knee section (23), the first part (21) being pivotally connected to the fastening arrangement (12) at a pivot point (P1); a tool attachment (14) device connected to the second part (22) of the at least one loader arm (20); at least one tilting cylinder (16) connected to the tool attachment device (14) and to a knee link (30) arranged at the knee section (23), wherein the knee link (30) comprises a first attachment point (31) for connection with the tilting cylinder (16), a second attachment point (32) for connection with the loader arm (20), and a third attachment point (33) for connection to a mechanical self-levelling device (50), wherein the knee link (30) is arranged at the knee section (23), such that the first attachment point (31) is essentially aligned with or below an upper end (24) of the first part (21) of the loader arm (20).

A loader includes a tool carrier arranged on a loader boom. The tool carrier is connected at a first pivot point to the loader boom and at a second pivot point to a pivot linkage. The pivot linkage has first and second links which are pivotably connected to one another at a first link point. The first link is pivotably connected at a second link point to the loader boom, and the second link is pivotably connected at a second link point at the second pivot point to the tool carrier. A sensor senses a pivot angle between the tool carrier and loader boom. The sensor is positioned in a cavity on the loader. An actuating device is connected to the sensor.

A construction machine comprising a machine frame, a plurality of ground engaging units for supporting the machine frame from a ground surface, a work tool coupling, left and right boom arms pivotally supported directly or indirectly from the machine frame and pivotally connected to the work tool coupling, left and right work tool actuators mounted on the left and right boom arms, respectively, and left and right actuator linkages connecting the left and right work tool actuators, respectively, with the work tool coupling.