Contractors Hot Line November 1, 2024 | Page 41

let alone where.
Where Is It Located?
While some can be stand- alone components, most are integrated into the axle housing of the machine. For example, they are in the hubs of the drive( rear) sprockets of an excavator, the front wheels of a skip loader and in the sprocket which gives a track loader the“ hump” in its track.
How Does It Work?
The most common final drives are enclosed boxes that contain two, three or more planetary gears that are turned by a much smaller sun gear and held in place by a stationary toothed ring gear.
The planetary system gets its name from its analogy to orbiting planets circling around the sun. It is also known as an epicyclic gear system. By the time the power has reached the sun gear, it has already been stepped down considerably and at the same time the torque has exponentially increased. However, this last piece of the
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