Drive/Lift Pothole
Protector Interlock
The aerial platform drive and lift functions are inter-
locked 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 plat-
form is elevated approximately 7
′
(2.1 m).
If an obstruction under the skids, or some other impair-
ment prevents the skids from locking into position, the
drive and lift 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 inter-
locked through a level sensor system. The drive/lift level
sensor interlock operates when the platform is elevated
approximately 7
′
(2.1 m).
If the chassis is tilted more than 2 degrees side-to-side or
more than 4 degrees front-to-rear, the drive and lift func-
tions will not operate and an alarm will sound.
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 can 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
The emergency lowering lever may be used to lower the
platform if there is a malfunction in the hydraulic or elec-
trical system. The lever is mounted at the front of the ae-
rial platform (refer to Figure 4.4).
Figure 4.4—Emergency Lowering Lever
The emergency lowering lever may be used to lower the
scissors arms onto the safety prop before inspecting the
machine.
Safety Prop
The safety prop (refer to Figure 4.5) is used to support
the scissors structure when access to the scissors arm
components or the chassis is required. Always use the
safety prop when the platform is raised during inspec-
tion and maintenance.
Figure 4.5—Safety Prop
4 - 2
S1930 – 0361266
Chapter 4. Safety Devices
A
DANGER
Emergency Lowering Lever
Safety Prop
