Snorkel TB47J - Manual (Page 35)

Chapter 7 – Prestart Inspection
TB47J – 0075182 31
Figure 7.16 – Top of Main Boom at Base End
Also inspect the wire ropes just inside the base end of
the main boom (refer to Figure 7.17).
Figure 7.17 – Base End of Main Boom
Fasteners
Visually inspect all fasteners to see that none are miss-
ing or loose.
Pay particular attention to all of the bolts, nuts, rollpins,
collars, and snap rings that connect the booms and cyl-
inders. They should all be present, tight, and not dam-
aged in any way.
Raise the main boom to access the rotation bearing bolts
in the turntable (refer to Figure 7.18).
Inspect the welds on the structural components. Pay
particular attention to boom welds. The area to be in-
spected 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 ad-
equate visibility of the inspection area.
Slide Pads
The main boom has slide pads (refer to Figure 7.14) be-
tween the boom sections.
Figure 7.14 – Boom Sections
Use the lower controls to raise the main boom to horizon-
tal. Extend the tip boom about 1 ′ (30 cm). Visually in-
spect the slide pads to make sure they are in place and
are not obviously loose.
Inspect the surface where the pads contact the interme-
diate and tip booms. The paint must be in place with no
signs of bare metal.
Wire Ropes
Visually inspect the wire ropes where they are connected
to the outside of the main boom. There is a wire rope
connection on the bottom of the tip end of the main boom
(refer to Figure 7.15) and also one on the top of the base
end of the boom (refer to Figure 7.16).
Figure 7.15 – Bottom of Main Boom at Tip End
Slide Pads
Slide Pads