3-6
GTH-1544
Part No. 1272857
September 2016
Section 3 • Repair Procedures
BOOM COMPONENTS
How to Replace the Boom
Extend Chains
Note: Perform this procedure on a
fi
rm, level
surface with the wheels chocked.
1 Remove the boom, according to the dedicated
paragraph.
2 Place the boom on a structure capable of
supporting it.
3 Remove pin "b" and pulley "a".
4 Remove the bracket “
m"
.
5 Remove the boom telescope cylinder,
according to the dedicated paragraph.
6 Remove nuts "c" and counternuts "d" to free
the tensioners "e" placed inside the boom.
7 Remove the tensioners "e" from the chains, by
pulling out the retaining fasteners "f".
A
A
A
A
B
B
1° BOOM SECTION
CHAINS ANCHORAGE
3° BOOM SECTION
CHAINS ANCHORAGE
a
b
f
g
i
h
d
c
m
e
8 Remove the screws "g" securing the chain
anchor plates "h" of the retract chains,.
9 At the pivot end of the boom, remove the chain
by pulling i
t out of the boom assembly.
10 Using the assistance of a second operator,
install the chain by pulling the guide rope while
the other operator guides the chain.
11 Remove the guide rope.
12 Connect the chains to the chain anchor plates
"h" by means of the retaining fasteners "i".
13 Install the screws "g" securing the chains.
14 Connect the chains to the tensioners "e" by
means of the retaining fasteners "f".
15 Install the tensioners "e" in the bracket "m",
then install nuts "c" and counternuts "d" and
tension the chains.
16 Install the pulley "a" and pin "b" previously
removed from the pivot end of the boom.
