GROVE
Published 10-21-2011, Control # 055-03
4-1
5540F/YB5515 OPERATOR’S MANUAL
CAPACITY CHART
4
SECTION 4
CAPACITY CHART
SECTION CONTENTS
Using the Capacity Chart . . . . . . . . . . . . . . . . . . . . 4-1
Things to Observe When Using the Capacity
Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Determining Lift Capacity at the Boom Extension . 4-2
Pick And Carry Ranges . . . . . . . . . . . . . . . . . . . . . 4-2
USING THE CAPACITY CHART
The capacity chart for this crane is located on the inside of
the operator’s cab to the right of the seat. The chart provides
maximum loads that can be safely lifted and give conditions
under which these maximum lifts can be made.
Determine Operating Status
Operating radius is the distance from the centerline of
rotation to the center of the drop block hook or the down haul
weight, depending on which is installed.
Located on both sides of the boom is a indicator that gives
the angle at which the boom is positioned (Figure 4-1). This
angle along with the amount the boom is extended can be
applied to the range diagram in the Load Rating Chart to
determine the approximate lifting operating radius of the
boom. For example, if the boom is at a 60° angle and is fully
extended with the 4th section extended, the lifting radius is
approximately 23 feet (7 m). See sample chart in Figure 4-3
NOTE:
To determine the exact lifting radius, use a tape
measure and measure from the center rotation of
the mast to the center of the hook on either the
drop block or the down haul weight, depending on
which one is installed.
Determining Lift Capacity
Lift capacity is the weight that can safely be raised or lowered
by the crane. It is determined by two factors; structural
strength of the boom and boom extension, and crane
stability.
Located on the Load Rating and Range Diagram Chart are
the Main Boom Load and Boom Extension Ratings. Find the
approximate radius in the chart. Always use the next highest
radius if the actual radius is not on the chart. Read across the
line to the appropriate column to determine what can be lifted
at that radius.
NOTE:
Exceeding the capacity is dangerous and voids the
crane’s warranty.
Things to Observe When Using the Capacity
Chart
1.
The rated loads are the maximum lift capacities as
determined by operating radius, boom length and boom
angle. The operating distance from a projection of the
axis of rotation to the supporting surface, before loading,
to the center of the vertical hoist line or tackle load
applied.
2.
The rated loads shown in the Capacity Chart
on
Outriggers
do not exceed
85%
of actual tipping. The
rated loads shown
on rubber
do not exceed
75%
of
actual tipping. These ratings are based on freely
suspended loads with the crane leveled, standing on a
firm, uniform supporting surface. Practical working loads
depend on supporting surface, operating radius and
other factors affecting stability. Hazardous surroundings,
climatic conditions, experience of personnel and proper
training must be taken into account by the operator.
3.
The weights of all load handling devices such as hooks,
hook blocks, slings, jib boom, etc., except the hoist rope,
FIGURE 4-1
p1619
Boom Angle Indicator
Reference Only
