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5. If the intended load is heavier than the value in the
equivalent load zone the lift operation cannot be
made.
Examples of Estimating the Lift
Operation from the Load Chart
Note: The examples that follow are only for illustrative
purposes. This chart does not relate to any particular
machine. For lift operation, you should consult the load
charts that are mounted in the operator station. The
units on the load charts can be either kilograms or
pounds.
Each load chart has two parts:
• The chart shows regions which indicate if certain
capacities can be lifted.
• The derate table shows the loads that can be lifted
in the regions that are identified in the chart. Multiple
work tools are included and the operator must select
the work tool which is being used. The examples use
the standard fork carriage.
Example 1
• The weight of the intended load is 1000 units.
• The boom angle reference is 55 degrees.
• The boom extension reference scale is at "D".
With reference to the load chart, "X" is the point of
intersection for the values of the boom angle reference
and the boom extension reference. This point of
intersection is located in the load zone that is marked
"G". With reference to the derate table, the load zone
capacity of the work tool is 2000 units. The intended
load of 1000 units is less than the value in the load
zone so the load chart indicates that the load is within
the capacity of the machine.
Example 2
• The weight of the intended load is 3000 units.
• The boom angle reference is 40 degrees.
• The boom extension reference scale is at "B".
With reference to the load chart, "Y" is the point of
intersection for the values of the boom angle reference
and the boom extension reference. This point of
intersection is located in the load zone that is marked
"E". With reference to the derate table, the load zone
capacity of the work tool is 3000 units. The intended
load of 3000 units is the same value as the value in the
load zone so the load chart indicates that the load is at
the maximum capacity of the machine.
Example 3
• The weight of the intended load is 600 units.
• The boom angle reference is 22 degrees.
• The boom extension reference scale is
approximately 66 percent between "D" and full
extension.
With reference to the load chart, "Z" is the point of
intersection for the values of the boom angle reference
and the boom extension reference. This point of
intersection is located in the load zone that is marked
"K". With reference to the derate table, the load zone
capacity of the work tool is 400 units. The intended load
of 600 units is greater than the value in the load zone
so the load chart indicates that the load is beyond the
capacity of the machine. The lift operation must not
be attempted.
If the load chart indicates that the lift operation is within
the capacity of the machine, attempt to make the
operation but proceed with care. Remember that the
load may weigh more than the estimate for the load.
The load chart is for estimating the lift operation only.