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4.1
GENERAL
This machine is a Mobile Elevating Work Platform (MEWP) used to position personnel,
along with their necessary tools and materials at work locations.
The primary operator control station is in the platform. From this control station, the
operator can drive and steer the machine in both forward and reverse directions. The
operator can raise or lower the main or tower boom or swing the boom to the left or
right.
Standard boom swing is 355° non-continuous left and right of the stowed position. The
machine has a Ground Control Station which will override the Platform Control Station.
Ground Controls operate all functions except drive and steer. Except for performing
inspections and the Function Check, the ground controls are to be used in an
emergency to lower the platform to the ground should the operator in the platform be
unable to do so.
4.2
OPERATING CHARACTERISTICS AND LIMITATIONS
4.2.1
Operating Conditions
The boom can be raised above horizontal with or without any load in platform, if:
1. Machine is positioned on a smooth, firm surface within the limits of the maximum
operating slope.
2. Load is within manufacturer's rated capacity.
3. All machine systems are functioning properly.
4. Machine is as originally equipped from JLG.
4.2.2
Platform Load Sensing System (LSS)
The Platform Load Sensing System (LSS) measures platform load from a sensor in the
platform support.
If the LSS senses an overload condition, the overload alarm will sound, the overload
indicator will light up at both the platform control and the ground control stations, and
all boom functions will be disabled. To regain boom control, reduce the load in the
platform to not exceed the rated workload indicated on the capacity decal. If unable to
resolve the overload condition, auxiliary power may be used to return the platform to a
safe working condition. See Emergency Operation section.
EC450AJ, EC520AJ
SECTION 4
Machine Operation
31219187
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