The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Do not alter,
disable, or override any safety device.
5. If the platform does not stop raising or the alarm
does not sound, remove the machine from service
until the problem is corrected.
Emergency Lowering
Using the lower controls, fully raise the platform. Locate
the emergency lowering lever (refer to Figure 8.15) at
the rear of the aerial platform.
Figure 8.15—Emergency Lowering Level
While standing clear of the scissors structure, push the
lever down. The platform will begin to lower as the lever
is pushed down. Release the lever to stop.
Flashing Light
If the machine is equipped with the optional flashing
light (refer to Figure 8.16), visually check to see that it
flashes. The light should flash when power is turned on
to operate the machine.
Figure 8.16—Flashing Light
Structures
Visually inspect all mechanical structures including the
weldments and related components. It is important to
inspect the fasteners that connect the components.
Weldments
Visually inspect all weldments for abnormal wear, abra-
sion, or deformation that could cause interference be-
tween moving parts.
Inspect the welds on the structural components. The
area to be inspected should be clean and free of dirt and
grease. Look for visible cracks in the weld and at the
weld to parent material joint. A bright light may be used
to provide adequate visibility of the inspection area.
Pay close attention to welds in areas where changes in
cross section take place and near the attachment points
of highly loaded components.
Slide Blocks
Visually inspect the scissors arm slide blocks (refer to
Figure 8.17). The slide blocks must be free to move
without obstruction.
Figure 8.17—Scissors Arm Slide Blocks
Raise the platform from the lower controls to visually in-
spect the slide blocks underneath the front of the plat-
form (refer to Figure 8.18).
Figure 8.18—Platform Slide Blocks
8 - 6
S1930 – 0361266
Chapter 8. Prestart Inspection
Flashing Light
Emergency Lowering Lever
Slide Block
Slide Block
A
DANGER
