JLG M450 Operator Manual - Manual (Page 36)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-6 – JLG Lift – 3121210
Platform Station
(See Figure 3-3.)
1. Posi-Track Control
Activating the Posi-Track switch allows the operator to
engage positive traction for the time period pre-set in the
controller. Posi-traction occurs by changing the drive
motors from a series to parallel arrangement, causing
available power to be distributed evenly between the
two drive wheels. The control system may also engage
the posi-track function automatically.
ONLY USE THE PLATFORM LEVELING OVERRIDE FUNCTION FOR
SLIGHT LEVELING OF THE PLATFORM. INCORRECT USE COULD CAUSE
THE LOAD/OCCUPANT TO SHIFT OR FALL. FAILURE TO DO SO COULD
RESULT IN DEATH OR SERIOUS INJURY.
2. Platform Leveling Override
A three position switch allows the operator to adjust the
automatic self leveling system. This switch is used to
adjust platform level in situations such as ascending/
descending a grade.
3. Horn
A push-type HORN switch supplies electrical power to
an audible warning device when pressed.
4. Power/Emergency Stop
A two-position red mushroom shaped switch furnishes
power to PLATFORM Controls when pulled out (on).
When pushed in (off), power is shut off to the platform
functions.
Within about 2 seconds of pulling the switch out, the
machine will perform a diagnostic check of the various
electrical 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.
5. Generator Enable Control
The Generator Enable control switch, when in the off
position, allows the operator to prevent the generator
engine from starting when using the machine indoors.
When in the on position (and the ground Emergency
Stop Switch on [pulled out]), the generator is enabled to
automatically start when the batteries need charged.