2.6 Shim adjustment at upper part
of the boom bottom
(section [5] indicated in Figure 1)
1. After the adjustment of boom head side (sections
[3] and [4] shown in Figure 1), make the
adjustment below.
2. Check that the difference of the upper clearance
of boom bottom (dimension B) between the right
and left sides is 3 mm (0.12 in) or less.
[NOTICE]
If it exceeds 3 mm (0.12 in), go back to the step
"2.5 Clearance adjustment at upper part of boom
head" and adjust again.
3. Insert shims until the clearance (dimension C) on
the upper slide plate of boom bottom is minimum.
[NOTICE]
When using the 1.2-mm thick shims (24), always
put them under the 2.3-mm thick shims (23).
4. Apply a thread locking agent (ThreeBond 1305 or
the equivalent) to the retainer fixing bolt (27), and
tighten the bolt.
• Tightening torque:
74 to 82 N-m {7.6 to 8.4 kgf-cm} (55 to 60 ft-lbf)
2.7 Clearance check at upper part
of the boom bottom
(section [5] indicated in Figure 1)
1. After the adjustment of boom head side (sections
[3] and [4] shown in Figure 1), make the
adjustment below.
2. Check that the difference of the upper clearance
of boom bottom (dimension B) between the right
and left sides is 3 mm (0.12 in) or less.
Also, check that the clearance on the upper slide
plate of boom bottom (dimension C) is from 0 to 5
mm (0 to 0.2 in).
[NOTICE]
If the dimension B and dimension C are not
satisfied, pull out the boom, and then go back to the
step "2.2 Shim adjustment at upper part of boom
bottom" and "2.4 Shim adjustment at lower part of
boom head" and adjust again.
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