Page 30 - Cat Motor Grader Application Guide AEGQ0947-00

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M S E R I E S M O T O R G R A D E R S A P P L I C A T I O N G U I D E

28

Snow plowing techniques and the type of plowing equipment mounted on the motor grader vary greatly in different areas of the country due to: • Terrain

• Type of snow and its moisture content • Depth of snowfall normally expected

• Normal wind velocity that can cause extremely tight drifting

• Length of time after the snowfall before plowing was started

• How much melting has occurred • Amount of dirt mixed with snow

A major factor is traction. Snow plowing usually occurs under poor traction conditions which often require different operating techniques and the use of tire chains. In snowplowing, operating speeds are normally higher than in earthmoving work. Normal work speeds are in the 5 to 20 mph range. The moldboard should be tipped well forward to prevent damage to the machine and road surface. This allows the cutting edge to ride over rather than try to cut minor obstructions, and may prevent operator injury, cutting edge breakage or machine damage.

Objects can be hidden under the snow so wear your seat belt. Put a standard circle slip clutch attachment on the machine to prevent possible operator injury or machine damage. For safety, work in the direction of traffic when possible.

Blade float is frequently used in snow plowing work. This allows the blade to follow a varying surface using only the weight of the drawbar, circle and moldboard. Blade float prevents damage to uneven surfaces but requires a hard surface such as asphalt or frozen ground to prevent gouging the surface. In areas with loose gravel on the road surface, using blade float may windrow the gravel onto the road shoulder.

The many variables of snow plowing applications make it impossible to recommend one machine, one configuration, or one technique for all areas. This guide covers equipment and techniques most commonly used, so they may be used as a guide in your conditions.

Standard Motor Grader

Moldboard

The motor grader’s standard moldboard is the most commonly used attachment for snow plowing. It is used in areas where snow depths are low, the terrain is relatively flat, and where excessive drifting does not occur.

The standard moldboard can also be used to wing snow by repositioning the linkbar as shown above.

Tip the moldboard well forward to prevent damage to the road surface and allow the cutting edge to ride over rather than try to cut minor obstructions.

Snow Wing

The snow wing is a common snowplowing tool. It is a moldboard that normally mounts to the machine’s right side. It can be used alone or in conjunction with the motor grader moldboard to move snow off the road or other surface and to provide a wider cleared area per machine pass. The moldboard is frequently used to cut the material and feed it onto the wing. The wing curvature is designed to lift the material and throw it off the plowed surface. The ground speed needed to move snow off the roadway will vary with snow type and many other factors, but generally winging speeds fall in the 10 to 20 mph (16 to 32 km/h) range.

Page 30 - Cat Motor Grader Application Guide AEGQ0947-00

This is a SEO version of Cat Motor Grader Application Guide AEGQ0947-00. Click here to view full version

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