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Figure 10-34.—Paddle wheel scraper. | Up
Equipment Operator Basic - Beginning construction equipment operators manual | Next
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Figure 10-35.—Scraper nomenclature.
elevating scraper or self- loading scraper. This scraper,
on most projects, requires no push cat for loading and is
ideal for small- to medium-size earthmoving jobs. The
scraper loads its pan from the top by means of a paddle
wheel elevator after the material has been cut by the
cutting edge. Material is not forced to the top as on other
scrapers. The loaded material can also be unloaded by
the paddle wheels, giving the operator more control of
the desired depth of fill.
A variety of scrapers are used in the NCF. Each
operator is responsible for reading the operator’s
manual to obtain detailed information about each make
and model.
SCRAPER COMPONENTS
The scraper is made in two sections: the tractor and
the scraper. The tractor contains the engine, the drive
train and wheels, the hydraulic pumps, and the
operator’s cab. The tractor is connected to the scraper
by a vertical kingpin swivel connection usually in two
parts with upper and lower pins. When you are steering,
this connection permits turns of 85 to 90 degrees to each
side of the center line of the scraper. There is also a
longitudinal horizontal hinge that permits the two
sections to tip independently from side to side.
The gooseneck of the scraper arches up to allow
space for the tractor wheels to roll under it on turns. The
Figure 10-36.—Scraper bowl, apron, and ejector.
10-18
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