Gradall XL3100V Operators Safety Manual page 99

Section 3 - Operation
General
There is a lift capacity difference between the excavator's best and worst lift
positions. Just because it can lift a load from one point does not mean it can safely
deliver the load to any other point.
Prior to lifting and placing a load, map out the lift, swing, and lower path to ensure
that capacity, both hydraulic and stability tipping limits, are not exceeded. The best
lifting position is over the rear with the excavator level and the boom fully retracted.
You must plan the lift based on the worst condition of the lift and delivery, not the
best. The worst condition can only be determined by performing an UNLOADED
TEST AND DELIVERY of the load.
Loads shown on chart in cab are hydraulic lift capacities with those in shaded area
indicating tipping limits. Exceeding these capacities can cause a relief valve to open
allowing the load to fall or in some cases, the machine to tip over.
Positioning Machine For A Lift
The machine must be on a firm, level surface when making a lift.
The shorter the load radius, the greater the lift capacity. Position the unit to minimize
boom extension and swing while keeping adequate distance from obstructions and
excavations.
Position machine to gain maximum visibility of load and delivery point. If conditions
do not permit a clear view, use a signal person.
80884013 3-29