JLG 600SC_660SJC Operator Manual - Manual (Page 62)

SECTION 4 - MACHINE OPERATION
4-8 – JLG Lift – 3121156
Stability
Machine stability is based on two positions which are called
FORWARD STABILITY and BACKWARD STABILITY. The
machines position of least forward stability is shown in Fig-
ure 4-4., and its position of least backward stability is shown
in Figure 4-3.
TO AVOID FORWARD OR BACKWARD UPSET, DO NOT OVERLOAD
MACHINE OR OPERATE ON AN OUT-OF-LEVEL SURFACE.
Figure 4-3. Position of Least Backward Stability
PLATFORM ROTATED
90 DEGREES
MACHINE WILL UPSET
IN THIS DIRECTION IF
OVERLOADED OR
OPERATED ON AN
OUT-OF-LEVEL SURFACE
MAIN BOOM FULLY
RETRACTED AND
ELEVATED