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Chapter 7 – Prestart Inspection
To inspect the flashing light:
1. At the lower controls, pull the emergency stop button
outward. Place the control selector switch in the lower
control position.
2. Visually check to see that the light is flashing ap-
proximately one flash per second.
Note
There is not an off switch for the flashing light. The light
cannot be turned off.
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.
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).
36
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, roll pins, 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 main boom to access the inner race rotation
bearing bolts in the turntable (refer to Figure 7.10).
The outer race bolts can be viewed from under the
chassis looking upward.
Inner Race
Rotation Bearing Bolts
Figure 7.10 – Rotation Bearing Bolts
4. Inspect the inner and outer race rotation bearing bolts
to ensure that none are missing, damaged, or loose.
Upper Control Station
Inspect the platform and upper controls, after verifying all
functions operated properly from the lower controls.
Guardrail System
The guardrail system includes (refer to Figure 7.11):
• A top rail
• A mid rail
• Three entry gates: one on each side and one rear
• Toeboards around the sides of the platform.
460SJ – 1433685
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