Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

A track kit for a vehicle (2), having two track assemblies (1,1′), each track assembly having an endless track (5), a front idler wheel (8), an intermediate support member (6) with at least one track engaging element (7), a rear idler wheel (9), a drive wheel (10), at least one swing arm (11,12) and a shock absorber connecting assembly (13,14), wherein the endless track (5) has an external side featuring ground lugs (15) for ground engagement and an internal side featuring drive lugs (16) for engagement with the drive wheel (10), and the internal side is circumferentially trained around and in contact with the front idler wheel (8).

A track kit for a vehicle (2), having two track assemblies (1,1′), each track assembly having an endless track (5), a front idler wheel (8), an intermediate support member (6) with at least one track engaging element (7), a rear idler wheel (9), a drive wheel (10), at least one swing arm (11,12) and a shock absorber connecting assembly (13,14), wherein the endless track (5) has an external side featuring ground lugs (15) for ground engagement and an internal side featuring drive lugs (16) for engagement with the drive wheel (10), and the internal side is circumferentially trained around and in contact with the front idler wheel (8).

A suspension element includes a main body having an end cap defining an internal volume and a tubular element slidably engaged with the main body. The suspension element further includes a first piston and a flow control element. The flow control element is configured to prevent movement of the tubular element relative the main body in a direction. The suspension element may further include a locking member and a piston. The locking member may be configured to engage a barrier of the main body when the first piston traverses at least a predetermined distance towards the end cap. The locking member may be affixed to the tubular element and may fully surround the tubular element. Together the flow control element and the locking member are configured to prevent movement of the suspension element.

A suspension element includes a main body having an end cap defining an internal volume and a tubular element slidably engaged with the main body. The suspension element further includes a first piston and a flow control element. The flow control element is configured to prevent movement of the tubular element relative the main body in a direction. The suspension element may further include a locking member and a piston. The locking member may be configured to engage a barrier of the main body when the first piston traverses at least a predetermined distance towards the end cap. The locking member may be affixed to the tubular element and may fully surround the tubular element. Together the flow control element and the locking member are configured to prevent movement of the suspension element.

A crane, in particular a pick and carry crane, may have a front chassis with front wheels and a back chassis with back wheels, the front chassis being articulated relative to the back chassis so that the crane can travel whilst carrying a load suspended from a boom. The back and front wheels have independent suspensions which are capable of connection to one another so that movement of a left wheel influences movement of a right wheel, thereby improving the handing of the crane, particularly over rough terrain.

Tipping over of a work machine is prevented. The work machine includes: a vehicular body; a rear axle attached to the vehicular body to be capable of undergoing a roll motion with respect to an axis extending in a front-rear direction of the vehicular body; and a controller. The controller acquires stability of the center of gravity of the vehicular body, and controls the roll motion of the rear axle with respect to the vehicular body based on the stability.

Tipping over of a work machine is prevented. The work machine includes: a vehicular body; a rear axle attached to the vehicular body to be capable of undergoing a roll motion with respect to an axis extending in a front-rear direction of the vehicular body; and a controller. The controller acquires stability of the center of gravity of the vehicular body, and controls the roll motion of the rear axle with respect to the vehicular body based on the stability.

A track kit for a vehicle, the track kit having two track assemblies, each track assembly featuring an endless track and a pinch wheel in contact with the external side of the endless track, the pinch wheel having a pinch wheel axle being rigidly connectable to a chassis of the vehicle.