STRUCTURAL CD3340B/YB4411
11-10
Published 04/07/2015 Control # 569-00
3. Lock the pin in place with two set screws (72).
4. If grease fittings (74) were removed, install them into the
ends of pin (73). Apply Lithium Base, E.P. No. 2 bearing
grease to the two grease fittings.
5. Install the two bottom pads using four capscrews (78)
and lockwashers (77).
Preparing the 2nd Boom Section for Assembly
Refer to three-section boom assembly diagram at the end of
this manual for all part numbers in this section.
1. If the two top slide pads (34) were removed, install new
pads using two capscrews (36) and lockwashers (35).
Coat the thread of capscrew (36) with Loctite 243 before
installation.
2. The bearing in retract roller assembly (37) must be
lubricated with Lithium Base, E.P. No. 2 bearing grease.
Apply the grease through the two grease fittings in the
roller pin.
3. On new replacement boom sections, check that the
bronze wear pads (40) align with the mounting holes. If
they do not align, it is permissible to grind away some of
the weld to align the holes. Do not install the wear pads
at this time. Also, remove the paint from the eccentric
mounting hole. If the paint is not removed the anti-
double blocking system will not work properly.
Preparing the 1st Boom Section for Assembly
Refer to three-section boom assembly diagram at the end of
this manual for all part numbers in this section.
1. If bushings (52) were removed, press new bushings into
the boom section.
2. On new replacement boom sections, check that the
bronze wear pads (46) align with the mounting holes. If
they do not align, it is permissible to grind away some of
the weld to align the holes. Do not install the pads at this
time.
Assembling the 3rd Boom Section
Refer to three-section boom assembly diagram at the end of
this manual for all part numbers in this section.
NOTE: Apply anti-seize to all capscrew threads, unless
stated otherwise, before installation.
1. If boom slide pads (19) were removed, install new pads
using two capscrews (18). Coat the threads of capscrew
(18) with Loctite 243 before installation.
2. Install cylinder guide pad (17) using four capscrews (16)
and lockwashers (15).
3. Attach chain end (31) to chain (20) with pin (30) and
cotter pins (29).
4. From the boom tip end, thread the chain (20), chain end
(31) first, into the boom section and fasten chain end to
the boom using pin (11) and capscrew (10). Apply
Loctite 243 to the threads of capscrew (10) before
installation.
5. Attach chain end (23) to other end of chain (20) with pin
(21) and two cotter pins (22).
6. Coat the bottom of the telescope cylinder with an anti-
seize compound where it will slide on guide pad (17).
7. Using an overhead crane and sling, lift the telescope
cylinder assembly (25) and align it with the rear of the
3rd boom section. Then, insert the telescope cylinder at
least half way inside the 3rd boom section until the end
of the cylinder appears in second access hole from the
boom tip end.
8. Thread a puller wire through the 3rd boom section from
the cylinder end. Attach the puller wire to chain end (23).
Pull the chain through the boom section and onto the
tray on top of the telescope cylinder until the chain is
tight against the roller of the telescope cylinder
assembly.
9. Through the access hole, install the end guide bracket
(15) with four capscrews (19), lockwashers (20) and flat
washers (21).
10. Extend rod (24) has threaded ends. On the end with the
longer threads, coat the threads with an anti-seize
compound.
11. Install extend rod (24) into chain end (23) approximately
19 mm (3/4 in). Do not install the rod all the way into the
chain end. Fastening the rod to the 1st boom section will
not be possible if the rod is threaded in too far.
12. Coat the bottom of the 3rd boom section, where the
cylinder slide pad will slide, with an anti-seize
compound.
13. Slide the telescope cylinder all the way into the 3rd
boom section. When moving the cylinder assembly, pull
on the extend chain rod (24) to keep the chain tight.
Installing the 3rd Boom Section Into the 2nd Boom
Section
1. Coat the entire lower inside surface of the 2nd boom
section with an anti-seize compound using a roller and
rod (Figure 11-11). Coat the upper inside surface, where
CAUTION
Lockwashers (35) must be installed with capscrews (36).
If they are not, possible damage to the 3rd boom section
could occur.
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