Shibaura ST460, Руководство оператора

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2-39
TRACTOR WEIGHTING
For sufficient traction and maximum performance
in heavy draft operations, and to counterbalance
rear-mounted equipment, weight should be
added to tractor in the form of liquid ballast, cast
iron weights or a combination of both. Only
enough weight should be added to provide good
traction and stability. Adding more weight than is
needed results unnecessary soil compaction,
increased rolling resistance, and higher fuel
consumption.
NOTE: When adding weight to the tractor, tire
pressures may need to be increased. Refer to
the Tire Inflation Pressure chart found in page
2-41 of this manual.
WEIGHTING FOR STABILITY
Front end ballast may be required for stability
and steering control when weight is transferred
from the front wheels to the rear wheels as an
implement is raised by the tractor three-point
hitch.
As a general guide:
Ballast the tractor (less implement) so that
approximately one-third of the tractor weight is
on the front wheels. For optimum traction,
tractors equipped with front-wheel drive should
be ballasted so that 40-45% of machine weight is
on the front wheels.
When a mounted implement is raised to the
transport position, the front wheel reaction
should be at least 20% of tractor weight.
Add additional front end ballast as required for
stability during operation and transport. Tractor
front end ballast may not always maintain
satisfactory stability if the tractor is operated at
high speed on rough terrain. Reduce tractor
speed and exercise caution under these
conditions.
When using front-mounted equipment, add
weight to the rear axle of the tractor to maintain
good traction and stability. Front-mounted
equipment varies in weight. Refer to equipment
manual for ballasting.
WEIGHTING LIMITATIONS
The weighting limitations that follow are
limitations only. They do not imply that the tractor
should be weighted to attain the weights given.
Use only enough weight to obtain good
performance.