SAFETY INFORMATION GRT880 OPERATOR MANUAL
2-6 Published 3-25-2020, Control # 643-04
CRANE STABILITY/STRUCTURAL
STRENGTH
To avoid death or serious injury, make sure that the crane is
on a firm surface with load and crane’s configuration within
capacity as shown on the crane’s Load Chart and notes.
Make sure that all pins and floats are properly installed and
outrigger beams are properly extended before lifting on
outriggers. On models equipped with outriggers that can be
pinned at the mid-extend position (vertical stripe, if
applicable), the outriggers must also be pinned when
operating from the mid-extend position.
Use adequate cribbing under outrigger floats to distribute
weight over a greater area. Check frequently for settling.
Carefully follow the procedures in this Operator Manual
when extending or retracting the outriggers. Death or serious
injury could result from improper crane setup on outriggers.
The operator must select the proper Load Chart and Rated
Capacity Limiter (RCL) System program for the outrigger
position selected.
Before swinging the superstructure over the side when the
outriggers are retracted, check for backwards stability under
the sub-section titled Model Specific Information later in this
section.
Long cantilever booms can create a tipping condition when
in an extended and lowered position. Retract the boom
proportionally with reference to the capacity of the applicable
Load Chart.
Check crane stability before lifting loads. Make sure that the
outriggers (or tires if lifting on rubber) are firmly positioned on
solid surfaces. Make sure that the crane is level, brakes are
set, and the load is properly rigged and attached to the hook.
Check the Load Chart against the weight of the load. Lift the
load slightly off the ground and recheck the stability before
proceeding with the lift. Determine the weight of the load
before you attempt the lift.
Unless lifting within On Rubber capacities, outrigger beams
and jack cylinders (plus center front stabilizer, if equipped)
must be properly extended and set to provide precise
leveling of the crane. Tires must be clear of the ground
before lifting on outriggers.
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