Snorkel S3246 CE - Manual (Page 29)

Chapter 8 – Prestart Inspection
S2646/3246 – 0410063EE 25
3. With the trays closed, check the ground clearance
under the pothole protector skids (refer to Figure 8.12).
Clearance should be at about 10.1 cm (4
″
) on both
sides of the aerial platform.
Figure 8.12 – Pothole Protector Skid
4. Raise the platform while watching movement of the
skids. The skids should lower to approximately 2.5
cm (1
″ ) ground clearance when the platform is raised
approximately 61 cm (24 ″ ).
5. Fully lower the platform while watching movement of
the skids. The skids should raise to their stowed
position, with about 10.1 cm (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 Interlock Test
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 2.1 to 2.4 m (7 to 8 feet)
platform floor height. The alarm should then sound
when the platform lift switch is activated and the plat-
form 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 2.1 to 2.4 m (7 to 8 feet)
platform floor height. The alarm should then sound
when the platform raise 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 handle (refer to Figure 8.14) at
the rear of the aerial platform.
Figure 8.14 – Rear of Chassis
While standing clear of the scissors structure, pull the
handle out and the platform will begin to lower. Push the
handle in to stop. Make certain the handle is all the way
back in after lowering the platform.
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.
Pothole Protector Skid
Pothole Protector Skid
2 x 4
Emergency Lowering Handle