JLG 600SC_660SJC Operator Manual - Manual (Page 54)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3121606
Stability
Machine stability is based on two positions which are called FOR-
WARD STABILITY and BACKWARD STABILITY. The machines posi-
tion of Least Backward Stability is shown in Figure 4-1., and its
position of Least Forward Stability is shown in Figure 4-2.
TO AVOID FORWARD OR BACKWARD UPSET, DO NOT OVERLOAD MACHINE OR OPER-
ATE ON AN OUT-OF-LEVEL SURFACE.
Figure 4-1. 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