Jlg M400 Operator Manual User Manual Page 40

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SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-6 – JLG Lift – 3121644
Platform Station
(See Figure 3-3.)
1. Posi-Track Control
Activating the Posi-Track switch allows
the operator to engage positive trac-
tion 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 situa-
tions 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 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.
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