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Chapter 4 – Safety Devices
Drive Motion Alarm
When the joystick is moved out of neutral to drive the
aerial platform, the alarm emits a loud beeping sound to
warn personnel in the work area to stand clear.
Pothole Protector Skids
The pothole protector skids automatically lower when the
platform is elevated approximately 24" (61 cm). Ground
clearance is reduced from 2.63" (6 cm) to 3/4" (1.9 cm)
when the skids lock into position (refer to Figure 4.4).
Pothole Protector Skids
Figure 4.4 – Pothole Protector Skids
Danger
The aerial platform can tip over if it becomes unsta-
ble. Death or serious injury will result from a tip-over
accident. Do not drive or position the aerial platform
for elevated use within 4' (1.2 m) of any drop-off, hole,
or other tip-over hazard.
This protection system limits the tilt angle if a wheel is
driven into a drop-off or hole. This greatly reduces the
likelihood of the aerial platform tipping over.
The pothole protection system is for added protection and
does not justify operating near drop-offs or holes.
Drive/Lift Pothole Protector Interlock
The aerial platform drive and lift functions are interlocked
through a limit switch 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 6' (1.8 m).
If an obstruction under the skids, or some other impair-
ment prevents the skids from locking into position, the
drive and steer functions will not operate.
Lower the platform and remove the obstruction when the
drive/lift pothole protector interlock is engaged.
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 approx-
imately 6' (1.8 m).
16
The drive and lift functions will not operate and an alarm
will sound if the chassis is tilted more than:
S3226E
1.5° side-to-side and 4° front-to-rear
S3215L/S3215E/S3219E/S3220E/S4726E/S4732E
2° side-to-side and 4° front-to-rear
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.
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.
Emergency Lowering Lever/Handle
The emergency lowering lever/handle may be used to
lower the platform if there is a malfunction in the hydraulic
or electrical system.
The lever for the S3215L/S3215E/S3219E is mounted at
the front of the aerial platform (refer to Figure 4.5).
Emergency
Lowering Lever
Figure 4.5 – Front of Machine
S3215L/S3215E/S3219E/S3220E/S3226E/S4726E/S4732E – 1500834
Danger
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