JLG M450 Operator Manual - Manual (Page 48)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3121210
Stability
Machine stability is based on two positions which are called
FORWARD and BACKWARD stability. The machines position
of least FORWARD stability is shown in Figure 4-1., Position
of Least Forward Stability, and its position of least BACK-
WARD stability is shown in Figure 4-2., Position of Least
Backward Stability.
TO AVOID FORWARD OR BACKWARD TIPPING, DO NOT OVERLOAD
MACHINE OR OPERATE THE MACHINE ON AN OUT-OF-LEVEL SURFACE.
4.3 MOTOR OPERATION
Power/Emergency Stop
The Power/Emergency Stop switch, when pulled out (on),
provides battery power for all machine functions. The switch
should be pushed in (off) when recharging the batteries or
parking the machine overnight.
NOTE: If equipped with the optional on-board generator, the
Emergency Stop switch must be left on (pulled out) to
allow for automatic charging of the batteries.
Within about 2 seconds of pulling the switch out, the
machine will perform a diagnostic check of the various elec-
trical circuits, and if everything is OK, the platform alarm will
beep once. During this time the lights on the indicator panel
will also blink once as a bulb check.