A method of operating a digging machine, including damping the response of a boom hydraulic cylinder operationally connected to a boom arm and actuating a bucket hydraulic cylinder operationally connected to a bucket.

On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The control valve is supported by a support member, and a controller that outputs a signal for driving the control valve is mounted to a side plate part of the support member, thereby to be placed in a position in front of the control valve and above the battery.

A hydraulic excavator enabling an efficient arrangement of a coolant pipe is provided. A fuel tank has a lateral side surface located outward relative to a lateral edge of a revolving frame. The hydraulic excavator includes an exterior cover laterally covering a mount member, a coolant pipe directing a coolant for an engine to a reducing agent tank, and a reinforcement plate. The coolant pipe is arranged through a space under the fuel tank and between the mount member and the exterior cover. The reinforcement plate is provided outward of the coolant pipe and inward of the exterior cover.

A valve stack assembly includes a first valve assembly having at least one valve and defining a first plurality of fluid passageways. The valve stack assembly also includes a second valve assembly having at least one valve and defining a second plurality of fluid passageways. An end block defines a third plurality of fluid passageways. The end block is mechanically and fluidly coupled to the first valve assembly and the second valve assembly, such that the third plurality of fluid passageways fluidly couples the first plurality of fluid passageways and the second plurality of fluid passageways to one another. The first valve assembly is disposed along a first valve axis and the second valve assembly is disposed along a second valve axis. The first valve axis is offset from the second valve axis.

On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The controller, which outputs a signal to drive the control valve, is placed opposite the hydraulic oil tank.

A shovel includes an undercarriage, an upper swing structure swingably attached to the undercarriage, and an automatic greaser mounted on the upper swing structure. The automatic greaser is configured to individually change the amount of grease fed to a first greasing point among multiple greasing points and the amount of grease fed to a second greasing point among the multiple greasing points based on information on the multiple greasing points.

On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The controller, which outputs a signal to drive the control valve, is placed opposite the hydraulic oil tank.

The present disclosure relates to a boom energy and swing energy recovery system for mobile-linked construction machinery, and more particularly, to a boom energy and swing energy recovery system for mobile-linked construction machinery, which is controllable in conjunction with a mobile device. According to the present disclosure, the boom energy and swing energy recovery system is able to recover and utilize energy wasted in the event of boom-down and energy wasted in the event of body swing by including a boom energy recovery unit and a swing energy recovery unit, to operate in various modes of operation, and to be easily installed in or detached from existing construction machinery.

The present disclosure relates to an energy recovery apparatus, and more particularly, to an energy recovery apparatus for construction machinery and a construction machine including the same. According to the present disclosure, the energy recovery apparatus is able to recover and utilize energy wasted in the event of boom-down by including an accumulator assembly, to operate in various modes of operation, and to be easily installed in or detached from existing construction machinery.

The present disclosure relates to an energy recovery apparatus, and more particularly, to an energy recovery apparatus for construction machinery and a construction machine including the same. According to the present disclosure, the energy recovery apparatus is able to recover and utilize energy wasted in the event of boom-down by including an accumulator assembly, to operate in various modes of operation, and to be easily installed in or detached from existing construction machinery.