Stability; Position Of Least Backward Stability - JLG 400SJ Operation And Safety Manual

SECTION 4 - MACHINE OPERATION

Stability

This machine as originally manufactured by JLG Indus-
tries Inc., when operated within its rated capacity on a
smooth, firm and level supporting surface, and in accor-
dance with the instructions provided on the machine and
this manual, provides a stable machine for all platform
positions.
Machine stability is based on two positions which are
called FORWARD STABILITY and BACKWARD STABILITY.
The machines position of least backward stability is
shown in Figure 4-1., and its position of least forward sta-
bility is shown in Figure 4-2.
TO AVOID FORWARD OR BACKWARD UPSET, DO NOT OVERLOAD
MACHINE OR OPERATE ON AN OUT-OF-LEVEL SURFACE.
4-2
MACHINE WILL TIP
OVER IN THIS DIRECTION IF
OVERLOADED OR OPERATED ON
AN OUT-OF-LEVEL SURFACE
Figure 4-1. Position Of Least Backward Stability
– JLG Lift –
ROTATE PLATFORM
90 DEGREES
BOOM FULLY
ELEVATED AND
FULLY RETRACTED
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