Terex Genie GTH-1256, Руководство по обслуживанию и ремонту

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September 2016
Part No. 1272856 GTH-1256 3-7
Section 3 • Repair Procedures
BOOM COMPONENTS
How to Remove 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 Specifi cations
.
1 Place the machine in an area suf fi cient enough
to fully lower the outriggers and fully extend the
boom.
2 Remove the forks from the boom.
3 Lift the boom until the pin locking the lift
cylinder is in a position above the cab roof.
4 Place a stand under the lift cylinder to properly
support it once the pin connecting the cylinder
to the boom will be removed.
5 Attach a lifting strap from an overhead crane to
the fork support and slightly lift the boom. Do
not apply any lifting pressure.
6 Attach a second strap from the overhead crane
to the lifting cylinder, rod side, and put some
tension on it.
7 Using a soft metal drift, remove the slave
cylinder locking pin from the boom support.
DANGER
Crushing hazard. The cylinder
will fall if not properly supported
when the pivot pin is removed
from the machine.
8 Using a soft metal drift, remove the lift cylinder
locking pin, boom side.
9 Operate the 2 overhead cranes at the same
time to lower the boom being careful to rest the
lift cylinder onto the support previously placed
underneath, and the boom tip onto another
stand positioned to support the front part of the
boom.
10 Hook the 4 lifting points and then slowly lift the
boom.
11 Tag, disconnect and plug the hydraulic hoses
that go to the extend, retract, fork tilt and fork
leveling cylinders, and the quick coupling
cylinder (if equipped).
WARNING
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
12 Using a soft metal drift, remove the pin
securing the boom to the machine.
DANGER
Crushing hazard. The boom
will fall if not properly supported
when the pivot pin is removed
from the machine.
13 Carefully remove the boom assembly from the
machine and place it on a structure capable of
supporting it.