There is provided a method of lifting a shovel comprising an undercarriage and a superstructure with a counterweight. The method comprises configuring the shovel and a front lifting assembly and a rear lifting assembly on a lifting site in a lifting configuration wherein the front lifting assembly matches corresponding force applying points on a front portion of an undersurface of the superstructure and the rear lifting assembly matches corresponding force applying points on an undersurface of the counterweight, wherein at least one of the front and the rear lifting assemblies includes a lifting beam including a set of spaced-apart lifting units and an elongated beam extending inbetween; contacting the front lifting assembly and the rear lifting assembly with the corresponding force applying points on the undersurface of the front portion of the superstructure and the undersurface of the counterweight respectively; and starting a lifting operation to raise the superstructure to a desired height. There is also provided an apparatus for lifting the shovel from the ground surface.

There is provided a method of lifting a shovel comprising an undercarriage and a superstructure with a counterweight. The method comprises configuring the shovel and a front lifting assembly and a rear lifting assembly on a lifting site in a lifting configuration wherein the front lifting assembly matches corresponding force applying points on a front portion of an undersurface of the superstructure and the rear lifting assembly matches corresponding force applying points on an undersurface of the counterweight, wherein at least one of the front and the rear lifting assemblies includes a lifting beam including a set of spaced-apart lifting units and an elongated beam extending inbetween; contacting the front lifting assembly and the rear lifting assembly with the corresponding force applying points on the undersurface of the front portion of the superstructure and the undersurface of the counterweight respectively; and starting a lifting operation to raise the superstructure to a desired height. There is also provided an apparatus for lifting the shovel from the ground surface.

There is provided a method of lifting a shovel comprising an undercarriage and a superstructure with a counterweight. The method comprises configuring the shovel and a front lifting assembly and a rear lifting assembly on a lifting site in a lifting configuration wherein the front lifting assembly matches corresponding force applying points on a front portion of an undersurface of the superstructure and the rear lifting assembly matches corresponding force applying points on an undersurface of the counterweight, wherein at least one of the front and the rear lifting assemblies includes a lifting beam including a set of spaced-apart lifting units and an elongated beam extending inbetween; contacting the front lifting assembly and the rear lifting assembly with the corresponding force applying points on the undersurface of the front portion of the superstructure and the undersurface of the counterweight respectively; and starting a lifting operation to raise the superstructure to a desired height. There is also provided an apparatus for lifting the shovel from the ground surface.

There is provided a method of lifting a shovel comprising an undercarriage and a superstructure with a counterweight. The method comprises configuring the shovel and a front lifting assembly and a rear lifting assembly on a lifting site in a lifting configuration wherein the front lifting assembly matches corresponding force applying points on a front portion of an undersurface of the superstructure and the rear lifting assembly matches corresponding force applying points on an undersurface of the counterweight, wherein at least one of the front and the rear lifting assemblies includes a lifting beam including a set of spaced-apart lifting units and an elongated beam extending inbetween; contacting the front lifting assembly and the rear lifting assembly with the corresponding force applying points on the undersurface of the front portion of the superstructure and the undersurface of the counterweight respectively; and starting a lifting operation to raise the superstructure to a desired height. There is also provided an apparatus for lifting the shovel from the ground surface.

A power machine or excavator includes a swivel assembly coupling the upper frame portion to the lower frame portion, while providing accurate slew position measurement using a swivel sensor which is positioned to reduce measurement errors over a thermal range of operation of the power machine. The swivel assembly includes a swivel barrel configured to be attached to the lower frame portion of the power machine, and a swivel spool configured to be attached to the upper frame portion. The swivel sensor is positioned and configured to provide a sensor output indicative of a rotational position of the upper frame portion relative to the lower frame portion.

A power machine or excavator includes a swivel assembly coupling the upper frame portion to the lower frame portion, while providing accurate slew position measurement using a swivel sensor which is positioned to reduce measurement errors over a thermal range of operation of the power machine. The swivel assembly includes a swivel barrel configured to be attached to the lower frame portion of the power machine, and a swivel spool configured to be attached to the upper frame portion. The swivel sensor is positioned and configured to provide a sensor output indicative of a rotational position of the upper frame portion relative to the lower frame portion.

A method of adjusting a first plane of a work machine comprising first, second, third and fourth adjustable stabilisers that are each extendable between a minimum extension and a maximum extension. A difference in length between the minimum extension and the maximum extension is the same for each adjustable stabiliser. The first, second, third and fourth adjustable stabilisers are configured to support the work machine when a distal end of each adjustable stabiliser is in contact with a ground surface. A first stabiliser pair comprises the first adjustable stabiliser and the second adjustable stabiliser. A second stabiliser pair comprises the second adjustable stabiliser and the third adjustable stabiliser. The method comprises: a. extending the first, second, third and fourth adjustable stabilisers to a first configuration, wherein in the first configuration each adjustable stabiliser is at a calibration extension and the first plane is parallel to a reference plane defined by points of contact of the distal ends of the first, second, third and fourth adjustable stabilisers with the ground surface; b. adjusting the first stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a second configuration, wherein in the second configuration: either the tilt sensor indicates that the first plane is parallel to a first axis of a target plane; or the first adjustable stabiliser and the second adjustable stabiliser have reached the maximum extension; c. adjusting the second stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a third configuration, wherein in the third configuration: either the tilt sensor indicates that the first plane is parallel to a second axis of the target plane; or the second adjustable stabiliser and the third adjustable stabiliser have reached maximum extension.

A method of adjusting a first plane of a work machine comprising first, second, third and fourth adjustable stabilisers that are each extendable between a minimum extension and a maximum extension. A difference in length between the minimum extension and the maximum extension is the same for each adjustable stabiliser. The first, second, third and fourth adjustable stabilisers are configured to support the work machine when a distal end of each adjustable stabiliser is in contact with a ground surface. A first stabiliser pair comprises the first adjustable stabiliser and the second adjustable stabiliser. A second stabiliser pair comprises the second adjustable stabiliser and the third adjustable stabiliser. The method comprises: a. extending the first, second, third and fourth adjustable stabilisers to a first configuration, wherein in the first configuration each adjustable stabiliser is at a calibration extension and the first plane is parallel to a reference plane defined by points of contact of the distal ends of the first, second, third and fourth adjustable stabilisers with the ground surface; b. adjusting the first stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a second configuration, wherein in the second configuration: either the tilt sensor indicates that the first plane is parallel to a first axis of a target plane; or the first adjustable stabiliser and the second adjustable stabiliser have reached the maximum extension; c. adjusting the second stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a third configuration, wherein in the third configuration: either the tilt sensor indicates that the first plane is parallel to a second axis of the target plane; or the second adjustable stabiliser and the third adjustable stabiliser have reached maximum extension.

A mainframe rotation mechanism is of an excavation apparatus. The excavation apparatus includes a tubing unit, a base frame, and a mainframe. The base frame is disposed with the tubing unit as a center. The mainframe includes a horizontal frame and a plurality of columns. The horizontal frame includes a slide base for horizontally moving a hammer grab above the tubing unit. The plurality of columns support the horizontal frame above the base frame. The plurality of columns are arranged detachably from the base frame. A casing tube to be arranged in the tubing unit and the horizontal frame are coupled with each other through a rotation assist jig. The casing tube is rotated with the plurality of columns being detached from the base frame. The mainframe is rotated together with the rotation assist jig to a predetermined position.

A mainframe rotation mechanism is of an excavation apparatus. The excavation apparatus includes a tubing unit, a base frame, and a mainframe. The base frame is disposed with the tubing unit as a center. The mainframe includes a horizontal frame and a plurality of columns. The horizontal frame includes a slide base for horizontally moving a hammer grab above the tubing unit. The plurality of columns support the horizontal frame above the base frame. The plurality of columns are arranged detachably from the base frame. A casing tube to be arranged in the tubing unit and the horizontal frame are coupled with each other through a rotation assist jig. The casing tube is rotated with the plurality of columns being detached from the base frame. The mainframe is rotated together with the rotation assist jig to a predetermined position.