Snorkel S3219E-sn000017+ - Manual (Page 30)

Chapter 8 – Prestart Inspection
26 S3219E/S4732E – 1500834
Weldments
To inspect the weldments:
1. Visually inspect all weldments for abnormal wear,
abrasion, or deformation that could cause interfer-
ence between moving parts.
2. Inspect the welds on the structural components. The
area to be inspected should be clean and free of dirt
and grease.
3. Look for visible cracks in the welds and at the weld
to parent material joints. A bright light may be used
to provide adequate visibility of the inspection area.
4. Pay close attention to welds in areas where changes
in cross section take place and near the attachment
points of highly loaded components.
Rollers and Slide Blocks
To inspect the rollers and slide blocks:
1. Visually inspect the scissors arm rollers and slide
blocks (refer to Figure 8.14). They must be free to
move without obstruction. There is one roller and
slide block on each side of the chassis.
Figure 8.14 – Front of Chassis
2. Raise the platform from the lower controls and visu-
ally inspect the slide blocks underneath the front of
the platform (refer to Figure 8.15). There is one slide
block on each side of the platform. The slide blocks
must be in good condition and free to move without
obstruction.
Emergency Lowering System
Use the following procedure to test the emergency lower-
ing system:
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Stand clear of moving
components while test operating the machine.
1. Use the lower controls, fully raise the platform. Push
the emergency stop button inward.
2. Locate the emergency lowering lever at the front of
the aerial platform (refer to Figure 8.13).
Figure 8.13 – Front of Machine
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Make sure all person-
nel stand clear while lowering the platform with the
emergency lowering lever.
3. Make sure there is nothing in the way to obstruct the
platform when it lowers.
4. While standing clear of the scissors structure, push
downward on the lever to lower the platform. The
platform will begin to lower as the lever is pushed
down.
5. Release the lever to stop the platform from lowering.
Structures
Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.
Slide Block
Roller
Emergency
Lowering Lever