UniCarriers FD160-2 Operation & Maintenance Manual page 20

HOW THE LIFT TRUCK WORKS?
■ OUTSIDE THE TRIANGLE OF BALANCE, THE
TRUCK TIPS
Rear
wheels
Front
wheels
Lift truck Viewed from Above
For a lift truck to remain stable, the overall center of gravity must
be inside the triangle formed by the contact points of the left and
right front tires and the center point between the steering wheels.
The triangle defines the area of stability for the center of gravity.
If the overall center of gravity moves further forward than the
front wheels, the truck will tip forward with the front wheels as the
fulcrum. If the overall center of gravity moves outside the triangle
to the right or the left, the truck will fall over in that direction.
1-15
Axis of lateral stability
If the center of gravity W1 moves
outward past the axis of lateral
stability, the truck will roll.
(As the center of gravity comes
closer to the rear axle, the space
between the centerline of the truck
and the axis of lateral stability
narrows, and the truck will roll more
easily.)
■ RATED LOAD (LOAD WEIGHT AND LOAD CENTER)
HOW TO READ THE LOAD CHART
The higher the load is raised, and the further forward
from the front wheels the load is moved, the more the
weight of the load increases.
(Slightly heavier loads can be carried with dual tires)
Point A
Point B
The load center is the distance from the front face of the forks to
the center of gravity of the load. The rated load is the maximum
weight allowable with the nominal load center.
The Load Chart, showing the relationship between the load center
and the rated load, is attached to the truck as a decal. The rated
load decreases as the load center moves toward the tip of the
forks, and as the overall center of gravity moves forward.
Point C
Point D