Front:
A TYPE OF TRACTOR RECENTLY DEVELOPED IN CALIFORNIA FOR ROAD BUILDING
Back:
A Road-Building Tractor
To take care of the demands of the road-
building industry for a heavy service tractor,
the Yuba Manufacturing Company, 433 Cali-
fornia Street, San Francisco, Calif., has de-
veloped a machine especially built for road
building and maintenance. This Yuba road
builder is a 25-40 machine, the grouser plates
of which are of cast steel with a flat area in
contact with the road, about 16 square inches
for each tread. These treads are particularly
resistant to wear and are so designed that they
cannot mar the finest pavement. The entire
width of the front wheel rests squarely on the
road. The seat for the operator is of the ar-
tillery type, 14 inches wide and 6 feet long,
mounted on two sets of leaf springs and fitted
with a stuffed cushion. This provides for two
persons besides the driver, or enables the driver
to shift from side to side to watch the road
or stakes ahead.
The treads are covered with wide, heavy
fenders to protect the driver from dust and
dirt, affording protection from accidental con-
tact with moving treads, and support for the
tool boxes. The Yuba tractor is particularly
well known in the West, having first proved its
worth in the agricultural field and then in the
road-building field. In a test of a Yuba tractor
pulling a grader between Dallas and Fort
Worth, Texas, the dynamometer showed a
starting pull of 6,100 pounds and between 5,000
and 5,500 pounds under steady operation. The
outfit turns readily as sharply as the grader and
can swing in its own length.
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