Emergency Stop; Structures; Weldments; Boom Slide Pads - Snorkel A46JRT Operator's Manual

Chapter 7 – Prestart Inspection
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure all personnel stand
clear of the aerial platform while performing the pre-
start inspection.
Warning
The potential for an accident increases when operat-
ing an aerial platform that is damaged or malfunction-
ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.
5. Test the operation of each function in both directions.
Note
When checking the turntable rotation function in the
counterclockwise direction, the turntable will rotate to-
ward you.

Emergency Stop

To test the emergency stop button from the lower
controls:
1. Push the emergency stop button inward to shut off
the hydraulic system.
2. Test the lower control functions to make sure they no
longer operate.

Structures

Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.

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.
Pay particular attention to boom welds. 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.

Boom Slide Pads

The main boom has slide pads (refer to Figure 7.9) be-
tween the main and tip boom sections.
22
Slide Pads
Figure 7.9 – Slide Pads at Tip End of Boom
To inspect the slide pads:
1. Use the lower controls to position the main boom near
horizontal. Extend the tip boom about 1' (30 cm).
2. Visually inspect the slide pads to make sure they are
securely fastened to the main boom.
3. Inspect the surface where the pads contact the tip
boom. The paint must be in place with no signs of
bare metal.

Fasteners

To inspect the component fasteners:
1. Visually inspect all fasteners to see that none are
missing or loose.
2. Inspect all of the bolts, nuts, rollpins, collars, and
snap rings that connect the booms and cylinders.
They should all be present, tight, and not damaged
in any way.
3. Raise the riser boom to access the inner race ro-
tation bearing bolts in the turntable (refer to Figure
7.10). The outer race bolts can be viewed through
the openings in the turntable. Rotate the turntable to
inspect all of the outer race bolts.
A46JRT – 0261169