Snorkel S1930CE - Manual (Page 27)

Chapter 8 – Prestart Inspection
S1930 – 0361518EE 23
5. Fully lower the platform while watching movement of
the skids. The skids should raise to their stowed
position, with about 7 cm (2 3 /
4
″) ground clearance
when the platform is fully lowered.
6. Place a 3.8 cm (1 1 /
2
″) thick board, such as a 2 x 4,
under the skid on the left side (refer to Figure 8.13).
Figure 8.13 – Pothole Protector Skid
7. The board will prevent the skid from lowering fully.
Raise the platform. When the skid contacts the board,
the platform should stop raising and an alarm should
sound at approximately 2 m (7 ′) platform floor height.
The alarm should then sound when the platform lift
switch is activated and the platform should not raise.
8. Lower the platform. Place the board under the skid
on the right side.
9. Raise the platform. When the skid contacts the board,
the platform should stop raising and an alarm should
sound at approximately 2 m (7 ′) platform floor height.
The alarm should then sound when the platform lift
switch is activated and the platform should not raise.
A
Warning
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.
10. If the platform raise function is not disabled, or the
alarm does not sound remove the aerial platform 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 8.14) at the
front of the aerial platform.
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.
Figure 8.14 – Front of Chassis
Structures
Visually inspect all mechanical structures including the
weldments and related components. It is important to in-
spect the fasteners that connect the components.
Weldments
Visually inspect all weldments for abnormal wear, abra-
sion, or deformation that could cause interference between
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 8.15). The slide blocks must be free to move with-
out obstruction. There is one slide block on each side of
the chassis.
Figure 8.15 – Scissors Arm Slide Blocks
Emergency
Lowering Lever
Slide Block
Pothole Protector Skid
2 x 4