A construction machine that makes it possible for an operator to linearly push a bucket simply by operating an arm in a pushing direction is provided. A controller 50 is configured to, in a case where a straight locus is selected by a bucket locus selecting device 52, calculate a constant flow rate ratio α according to a boom initial angle that is an angle of a boom 2 sensed by a boom angle sensor 33 at a time point when an arm 4 is operated in a pushing direction by an operation device 51, and control the delivery flow rate of a first hydraulic pump 12 such that a hydraulic fluid is discharged from a cap chamber 1a of a boom cylinder 1 at a flow rate Qb obtained by multiplying a flow rate Qa of a flow supplied to a cap chamber 3a of an arm cylinder 3 by the flow rate ratio α while the arm 4 is operated in the pushing direction by the operation device 51 and there is not an instruction for operation of the boom 2.

A hydraulic system includes a first supply line connecting a boom control valve and a bottom side of a boom cylinder, a second supply line connecting the boom control valve and a rod side of the boom cylinder, a leveling switch valve having: a first operating position allowing a leveling operation of a working tool; and a first stopping position allowing the leveling operation to stop, a ride controller including: a ride-control switch valve connected to a branched fluid line branched from the first supply line; and an accumulator configured to perform an anti-vibrating operation for suppressing a pressure fluctuation of the boom cylinder, and a drain fluid line to discharge operation fluid in a downstream section extending from the leveling switch valve to the rod side of the boom cylinder in the second supply line when the leveling switch valve is switched to the first stopping position.

The invention relates to a method of controlling a working machine. The working machine comprises a first power source arranged to drive a mechanical driveline, a hydraulic system comprising a hydraulic pump and an actuator arranged to be driven to move by the hydraulic pump, where the hydraulic pump is separated from, or disconnectable from, the first power source. The method comprises determining whether the working machine is in an increased response mode. The method further comprises increasing a response of the hydraulic system upon determining that the working machine is in the increased response mode.

The disclosed embodiments relates an arrangement for tilting or turning a tool, the arrangement including at least one actuator for tilting and turning the tool, the actuator including at least a frame part adapted to be closed by a cover, the frame part and the cover enclosing a chamber portion (8) where a blade part having one or more blade gaskets is provided to divide the chamber portion into separate chamber spaces, the blade part being connected, at its first end, to a shaft, the second end of the blade part being adapted move reciprocally in the chamber portion, rotating the shaft at the same time. The joint between the frame part and the cover is sealed by a gasket contacting the blade gaskets.

The disclosed embodiments relates an arrangement for tilting or turning a tool, the arrangement including at least one actuator for tilting and turning the tool, the actuator including at least a frame part adapted to be closed by a cover, the frame part and the cover enclosing a chamber portion (8) where a blade part having one or more blade gaskets is provided to divide the chamber portion into separate chamber spaces, the blade part being connected, at its first end, to a shaft, the second end of the blade part being adapted move reciprocally in the chamber portion, rotating the shaft at the same time. The joint between the frame part and the cover is sealed by a gasket contacting the blade gaskets.

The present disclosure provides systems and methods for power machines, including a mini-loader that includes a frame, an operator station positioned toward a rear end of the frame and configured to be used by an operator who is behind or on the rear end of the frame, and a power source positioned toward a front end of the frame.

A shovel includes a plurality of driven elements, a plurality of actuators configured to drive the plurality of driven elements, and a hardware processor configured to, in response to detecting that two or more actuators of the plurality of actuators are synchronously moved, prohibit a motion of another actuator of the plurality of actuators that is different from the two or more actuators of the plurality of actuators.

A hydraulic system for a working machine includes hydraulic actuators actuated with hydraulic fluid delivered from a hydraulic pump, and control valves each of which is shiftable among shift positions to control a flowrate of hydraulic fluid flowing to the corresponding hydraulic actuator. Each control valve includes an input port, an output port, and a flowrate reduction section. When the control valve is shifted to a reduction position, the flowrate reduction section reduces a flowrate of the hydraulic fluid entering the input port and outputs the flowrate-reduced hydraulic fluid to the output port. At least one of the control valves includes a flowrate increase section. When the control valve is shifted to an increase position, the flowrate increase section outputs the hydraulic fluid having entered the input port to the output port at a flowrate larger than that of hydraulic fluid output by the flowrate reduction section.

A hydraulic system may include a first actuator to control a first linkage member, a second actuator to control a second linkage member, a first primary hydraulic circuit and a first secondary hydraulic circuit that include the first actuator, a second primary hydraulic circuit and a second secondary hydraulic circuit that include the second actuator, a first pump to cause fluid to flow through the first primary hydraulic circuit and the second secondary hydraulic circuit, a second pump to cause fluid to flow through the second primary hydraulic circuit and the first secondary hydraulic circuit, and a controller. The controller may be configured to determine that an operator assistance mode is enabled, and cause closing of a first valve that controls fluid flow through the first secondary hydraulic circuit and a second valve that controls fluid flow through the second secondary hydraulic circuit.

Disclosed are various embodiments for a front bucket loader apparatus. In one aspect, a front bucket loader apparatus for operating in low overhead space environments is disclosed. The front bucket loader comprises a front bucket with a bottom plate with a front edge, an opposing back edge, a left edge and an opposing right edge. The front bucket further has a left side wall attached to the left side of the bottom plate and a right side wall attached to the right side of the bottom plate. Further, it is configured with a top support bracket attached to the left side wall and to the right side wall. Further, the front bucket has a pivotable serpentine back wall, the pivotable serpentine back wall having an upper portion and a lower portion, the upper portion being supported by the top support bracket and the lower portion of the pivotable serpentine back wall configured for engaging the bottom plate of the front bucket. Lastly the front bucket has a slatted rear mount directly opposing the pivotable serpentine back wall. The front bucket loader further comprises a hydraulic assembly attached to the slatted rear mount of the front bucket and operatively connected to the pivotable serpentine back wall of the front bucket.