Special Limitations
6
S3219E/S3220E/S3226E/S4726E/S4732E – 1500842
Special Limitations
Travel with the platform raised is limited to creep speed
range. Elevating the platform is limited to firm, level
surfaces only.
Danger
The elevating function shall ONLY be used when the
work platform is level and on a firm surface.
The work platform is NOT intended to be driven over
uneven, rough, or soft terrain.
Platform Capacity
The maximum platform capacity for the aerial platform is
stated in the “Specifications” on pages 21-25.
Danger
DO NOT exceed the maximum platform capacity or
the platform occupancy limits for this machine.
Manual Force
Manual force is the force applied by the occupants to
objects such as walls or other structures outside the
work platform.
Refer to the platform capacity decal on the machine for
specific maximum allowable manual force information.
The maximum allowable manual force varies depending
on wind speed. The maximum allowable wind speed is
12.5 m/s (28 mph).
Danger
DO NOT exceed the maximum amount of manual
force for this machine.
Drive/Lift Pothole Protector Interlock
The aerial platform drive and lift functions are interlocked
through a limit switch inside the chassis that senses
whether or not the pothole protection linkage is locked
into position. The drive/lift pothole interlock operates when
the platform is elevated approximately 1.8 m (6 ).
If an obstruction under the skids, or some other impairment
prevents the skids from locking into position, the drive and
steer functions will not operate and an alarm will sound.
Lower the platform and remove the obstruction when the
drive/lift pothole protector interlock alarm sounds.
Drive/Lift Level Sensor Interlock
The aerial platform drive and lift functions are interlocked
through a level sensor system. The drive/lift level sensor
interlock operates when the platform is elevated approxi-
mately 1.8 m (6 ).
If the chassis is tilted too far out of level, the drive and
lift functions will not operate and an alarm will sound.
Refer to the machine specifications for the level sensor
factory setting.
Lower the platform and drive to a level surface when the
drive/lift level sensor alarm sounds.
The drive/lift level sensor system is for added protection
and does not justify operating on anything other than firm,
flat, level surfaces.
Lowering Alarm
When the joystick is moved out of neutral to lower the
platform, the alarm emits a loud beeping sound to warn
personnel in the work area to stand clear.
Danger
Pinch points exist on the scissors structure. Death
or serious injury will result if the scissors structure
lowers onto personnel within the scissors arms or
under the raised platform. Stand clear while raising
and lowering the platform.
Be careful when lowering the platform. Keep hands and
fingers away from the scissors structures components.
Lowering Interrupt
When the platform is lowered to about 1.8 m (6 ) lowering
stops. The platform will not lower for five seconds regard-
less of the control position to allow personnel to clear the
area of the scissors before the platform completely lowers.
Center the control in neutral to reset the lowering function,
then continue to lower the platform.
When the platform is below 1.8 m (6 ) and the control is
moved to lower the platform, there is a 1.5 second delay
before movement begins.
Overload Protection
When the load in the platform is near or at rated capac-
ity, an alarm will sound and the red light on the lower
The alarm and light warn the operator that the platform
is close to becoming overloaded. All functions remain
fully operational.
Danger
The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac-
cident. Do not exceed the capacity values indicated
on the platform rating placard.
If the platform is fully lowered and is overloaded, when
it is elevated just past 1.8 m (6 ), a control module will
stop the lift and drive functions and the alarm will sound
lowered to remove the excess load.
If the platform is elevated just past 1.8 m (6 ) and material
is added to the platform overloading it, a control module
will stop the lift, drive and lower functions and the alarm
remove the load in excess of rated capacity and cycle
