3-8
GTH-1256
Part No. 1272856
September 2016
Section 3 • Repair Procedures
How to Disassemble the Boom
WARNING
Bodily injury hazard. This
procedure requires speci
fi
c
repair skills, lifting equipment
and a suitable workshop.
Attempting this procedure
without these skills and tools
could result in death or serious
injury and signi
fi
cant component
damage. Dealer service is
strongly recommended.
Note: When removing a hose assembly or
fi
tting,
the O-ring on the
fi
tting and/or hose end must be
replaced and then torqued to speci
fi
cation during
installation. Refer to Section 2, Hydraulic Hose
and Fitting Torque Speci
fi
cations.
1 Place the machine in an area suf
fi
cient enough
to fully lower the outriggers and fully extend the
boom.
2 Using a soft metal drift and a hammer, remove
the rod end pivot pin from the tilt cylinder. Keep
attention to choose a drift smaller than the pivot
pin!
3 Remove the bottom end carter of the boom.
4 Tag, disconnect and plug the four hydraulic
hoses 1 from bracket 3.
Remove the two brackets 2 with the relative
pulleys.
5 Extend the boom until the inspection holes are
accessible on the inner boom section.
6 Inserting a spanner through the inspection
holes, remove the screws which
fi
x the hoses
holder block and disconnect the hydraulic
hoses on the upper boom side.
BOOM COMPONENTS
2
1
3
7 Completely retract the boom.
8 Pull out the internal steel hoses assembly.
9 Using a soft metal drift and a hammer, remove
the rod end pivot pin from the extend cylinder.
Keep attention to choose a drift smaller than
the pivot pin!
10 In the lower section of the boom, tag and
disconnect the chains from the chain tensioner.
11 Repeat step 11 for the upper section of the
boom.
