An amphibious caterpillar vehicle includes a central body of a second buoyancy material of a track shoe is disposed between a pair of wheels. An engagement body of the second buoyancy material of the track shoe is inserted into a buoyancy material engagement groove of each of the wheels so that a driving force is transferred from a driving sprocket to a caterpillar track. A coupling force between driving sprockets and track shoes forming a caterpillar track increases so that the caterpillar track is able to stably receive the driving force without slipping from the driving sprockets.

An amphibious caterpillar vehicle includes a central body of a second buoyancy material of a track shoe is disposed between a pair of wheels. An engagement body of the second buoyancy material of the track shoe is inserted into a buoyancy material engagement groove of each of the wheels so that a driving force is transferred from a driving sprocket to a caterpillar track. A coupling force between driving sprockets and track shoes forming a caterpillar track increases so that the caterpillar track is able to stably receive the driving force without slipping from the driving sprockets.

A compact utility loader compact utility loader comprising a frame, and a pair of loader arms supported by the frame. The frame includes a right side, a left side, and a bottom side extending between the right side and the left side. The compact utility loader additionally includes an engine mount secured to the bottom side of the frame and spaced apart from each of the left side and the right side of the frame. The compact utility loader further comprises an engine supported on the engine mount.

A compact utility loader compact utility loader comprising a frame, and a pair of loader arms supported by the frame. The frame includes a right side, a left side, and a bottom side extending between the right side and the left side. The compact utility loader additionally includes an engine mount secured to the bottom side of the frame and spaced apart from each of the left side and the right side of the frame. The compact utility loader further comprises an engine supported on the engine mount.

There is disclosed a track assembly having a frame; an endless track engaged with a track wheel system, the track wheel system having a track driving wheel and at least another wheel. An axle engaging device is rotatably mounted to the frame and is securable to a driven axle of a vehicle. An axis of rotation of the axle engaging device is spaced apart from a ground contacting area of the endless track by a distance taken along an axis perpendicular to the ground contacting area. A mechanism drivingly engages the axle engaging device to the track driving wheel. The mechanism defines a speed ratio defined as a rotational speed of the track driving wheel over a rotational speed of the axle engaging device. The distance is greater than a product of the speed ratio by a radius of the track driving wheel.

There is disclosed a track assembly having a frame; an endless track engaged with a track wheel system, the track wheel system having a track driving wheel and at least another wheel. An axle engaging device is rotatably mounted to the frame and is securable to a driven axle of a vehicle. An axis of rotation of the axle engaging device is spaced apart from a ground contacting area of the endless track by a distance taken along an axis perpendicular to the ground contacting area. A mechanism drivingly engages the axle engaging device to the track driving wheel. The mechanism defines a speed ratio defined as a rotational speed of the track driving wheel over a rotational speed of the axle engaging device. The distance is greater than a product of the speed ratio by a radius of the track driving wheel.

A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (F) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (O.sub.1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (O.sub.1) of the tooth (12) at an angle (A.sub.1) in a range of 0° or greater to 7.5° or less so as to approach the center line (O.sub.1) of the tooth (12) towards a tooth tip surface (12d).

A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (F) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (O.sub.1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (O.sub.1) of the tooth (12) at an angle (A.sub.1) in a range of 0° or greater to 7.5° or less so as to approach the center line (O.sub.1) of the tooth (12) towards a tooth tip surface (12d).

A controller may receive, from a sensor device of a machine, machine drivetrain data indicating a load, on a drivetrain of the machine, over a period of time. The controller may detect, based on the machine drivetrain data, one or more occurrences of a decrease in the load during the period of time. The controller may determine that the one or more occurrences, of the decrease in the load, are unexpected. The controller may detect wear of a component of an undercarriage of the machine based on determining that the one or more occurrences, of the decrease in the load, are unexpected. The controller may cause an action to be performed based on determining the wear of the component.

A controller may receive, from a sensor device of a machine, machine drivetrain data indicating a load, on a drivetrain of the machine, over a period of time. The controller may detect, based on the machine drivetrain data, one or more occurrences of a decrease in the load during the period of time. The controller may determine that the one or more occurrences, of the decrease in the load, are unexpected. The controller may detect wear of a component of an undercarriage of the machine based on determining that the one or more occurrences, of the decrease in the load, are unexpected. The controller may cause an action to be performed based on determining the wear of the component.