3-6
GTH-1256
Part No. 1272856
September 2016
Section 3 • Repair Procedures
BOOM COMPONENTS
7 At the fork end of the boom, remove nuts and
counternuts to free the tensioners "n" placed
under the boom.
8 Remove pins "o" to separate the chain anchor
plates "p" from tensioners "n".
9 Remove the retaining fasteners "q" to free the
chain.
11 At the pivot end of the boom, remove the chain
by pulling it out of the boom assembly.
12 Remove the rope from the old chain and attach
it to the new chain.
13 Using the assistance of a second operator,
install the chain by pulling the guide rope
from the fork end of the boom while the other
operator guides the chain from the pivot end of
the boom.
14 Install the lower screws securing the lower
chains "f" - "g".
15 Remove the guide rope.
16 Connect the chain to the anchor plates "p" by
means of the retaining fasteners "q".
17 Install the anchor plates "p" on tensioners "n"
and lock in place by means of pins "o".
18 Install tensioners "n" on the boom and lock in
place with the relevant nuts and counternuts.
19 Tension the chain.
20 Install the pulleys and pins previously removed
from the pivot end of the boom.
21 Extend and retract the boom to insure it
operates smoothly.
10 Securely attach a guide rope to the chain. This
will be used to install the new chain.
Note: Rope coming loose from the chain
during removal may result in a dif
fi
cult
reassembly. Be sure the rope is securely
attached to the chain and boom structure
before pulling the chain out of the boom.
n
p
q
o
