A hydraulic drive system for a hydraulic excavator that enables leveling work and a jack-up operation by a blade in a float state, that can prevent a body from falling even when an operator has falsely operated the hydraulic excavator during the jack-up operation by the blade, and that yet can perform favorable leveling work with the blade turned into the float state is provided. A float switch 37, a float valve 38, and a controller 34 are provided, the float valve 38 is changed over to a float position VI upon operating the float switch 37 when the blade is not in a jack-up state, the float valve 38 is changed over from the float position VI to a normal position V when the float valve 38 is in a state of being at the float position VI and an operation lever device 22 has been operated, and the float valve 38 is kept at the normal position V when the float valve 38 is at the normal position V and the float switch 37 has been operated in the jack-up state.

The present invention relates to a system and method for cutting and manipulating the used wind turbine blades for disposal. The system includes but is not limited to a primary drive, a secondary drive, a protective hood and flipper arm for manipulating the blade during cutting.

The present invention relates to a system and method for cutting and manipulating the used wind turbine blades for disposal.

A zero-turn mower including a removably attached front-end loader, where front-end loader includes two boom arms and a bucket, and an attachment mechanism. The attachment mechanism may include a center plate, a loader attachment mechanism, and a mower attachment mechanism.

An example work machine control system includes target fill level determination logic configured to determine a target fill level for a container of an earth-moving work machine, fill level measurement logic configured to receive a sensor signal from a sensor that detects contents of the container and generate a measurement metric indicative of a current fill level of the container based on the sensor signal, and control logic configured to generate a machine control signal based on the measurement metric and the target fill level.

An example work machine control system may include cost factor logic to obtain a cost factor for a resource, cost variable logic to obtain a consumption signal from a consumption sensor indicative of consumption of the resource, fill measurement logic configured to receive a fill signal from a fill sensor, the fill signal indicative of a fill state of a container of an earth-moving work machine, fill target logic to determine a target fill level for the container based on the cost factor, the consumption signal and the fill signal and control logic to generate a machine control signal based on the target fill level.

A tracked vehicle comprising: a first and a second track; a generator assembly configured to generate mechanical power; a group of work devices coupled to the generator assembly; a first and a second drive wheel coupled to the first and to the second track, respectively, and to the generator assembly; a user interface configured to receive commands from an operator; and a control unit connected to the user interface to receive commands from the operator; the control unit being configured to: measure an amount of time elapsed between a command sent by the operator and a subsequent command sent by the operator; and set the tracked vehicle to a blocked state if the amount of time measured is greater than a first time interval threshold.

Vehicles having a control console that may be moved between a plurality of locations relative to the body of the vehicle are disclosed. The control console may include a direction control device for controlling movement of the vehicle that is adaptive such that movement of the vehicle is based on both the direction at which the direction control device is actuated and the sensed position of the control console.

An excavator quick hitch comprises a quick hitch body, the body comprising: a first mounting position arrangement for attaching an excavator attachment in a first position; and a second mounting position arrangement for attaching the, or an alternate, excavator attachment in a second position, wherein in certain embodiments, the quick hitch (also sometimes called a quick coupler in various countries) can facilitate mounting of more than one excavator attachment, at the same time.

an An arm for a material handling machine includes a first plate, a second plate, and a pair of side walls. The second plate includes two opposite edges and a first of the pair of side walls is welded inward of the first edge of the second plate. A second of the pair of side walls is welded inward of the opposite edge of the second pate to form two flanges, with each of the two flanges extending on opposite sides of the second plate and having at least one hole at each of its ends. Each of the flanges has a length that is longitudinal with respect to the arm and a width that is transverse with respect to the arm and the length of each flange is between and of the length of the arm.