National Crane 600H, Руководство по обслуживанию

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BOOM 600H SERVICE MANUAL
4-50
08-19-2022 Control # 092-13
NOTE: If the front of the is elevated too far when sliding the
sections together, the back wear pads may fall off
into the boom.
16. With a 3/8 in socket extension (Figure 4-32), adjust the
cam until the rear of the back 6
TH
section is centered in
the 5
TH
section.
Use the slots on the side of the 5
TH
section to measure
the center point of the 6
TH
section (Figure 4-32).
NOTE: To aid in wear pad adjustment, it may be necessary
to jiggle the front of the boom side to side.
17. Tighten the wear pad and cam bolts.
18. Slide the 6
TH
section into the 5
TH
section far enough to
be able to reach the retract cable. Remove the retract
cable from inside the 6
TH
section and guide the cable
through the slots in the back of the 5
TH
section
(Figure 4-33).
NOTE: When sliding boom sections together, keep tension
on the cables to keep the cables from being
jammed between the boom sections.
FIGURE 4-31
Insert a locator bar here for the 6
TH
and 5
TH
section assemblies. When the boom sections
are assembled, the bar locates the inner
section below the wear pad access holes.
Wear Pad
Access Holes
6
TH
Section
Retract Cable
6
TH
Section
5
TH
Section
Measure the center
point through the slot on
each side of the boom.
FIGURE 4-32
Use a 3/8 in
socket to adjust
the wear pads.
REFERENCE ONLY