Manitowoc Grove CD3340B Service Manual page 296

STRUCTURAL
a0607
Adjusting Nut and
Jam Nut Location
p0692
11-4
NOTE:
Scribe Line
4.
Upper Extend Chain
1.
2.
FIGURE 11-3
3.
Published 04/07/2015 Control # 569-00
Use the following procedure to check if the chain is
too tight after adjusting: Remove the inspection
c o ve r f r o m o n t o p o f t h e 1 s t b o om se c t io n
(Figure 11-4). Then retract the booms and check
that the 3rd boom section has bottomed against the
2nd boom section. If the 3rd boom section has not
bottomed, the chain is too tight and must be
loosened.
If the chain is too tight, loosen the jam nut (Figure 11-3)
and turn the adjusting nut to loosen the chain. Tighten
the jam nut against the adjusting nut. Recheck for
correct tightness as described in NOTE above.
Completely retract the boom sections.
Remove the inspection cover from on top of the 1st
boom section (Figure 11-4) to expose the ends of 2nd
and 3rd boom sections. The boom sections should be
bottomed against each other.
If the chain is too loose DO NOT use the castle nut
(Figure 11-5) to remove the slack. Instead, extend the
booms until the extend rod is visible through the
inspection opening. Scribe a line on the 3rd section to
tell when the section moves. Attach a pipe wrench to the
extend rod (Figure 11-6) and turn the rod into the chain
end. While turning the extend rod observe the boom
section to see when it moves out slightly.
CD3340B/YB4411
FIGURE 11-2