Terex Genie Z-34/22 IC, Service And Repair Manual

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September 2016 Service and Repair Manual
Primary Boom Components
Part No. 1274592 Z-34/22 IC 33
4-3
Primary Boom Lift Cylinder
The primary boom lift cylinder raises and lowers
the primary boom. The primary boom lift cylinder is
equipped with a counterbalance valve to prevent
movement in the event of a hydraulic line failure.
How t o R emove t he Primary Boom Lif t Cyli nder
How to Remove the Primary
Boom Lift Cylinder
Bodily injury hazard. This
procedure requires specific repair
skills, lifting equipment and a
suitable workshop. Attempting
this procedure without these skills
and tools could result in death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
1 Raise the primary boom enough to access the
primary boom lift cylinder rod-end pivot pin.
2 Raise the secondary boom enough to access
the primary boom lift cylinder barrel-end pivot
pin.
3 Attach a lifting strap from an overhead crane
to the primary boom for support. Do not apply
any lifting pressure.
4 Place a block of wood across the upper
secondary boom to support the cylinder when
the rod-end pivot pin is removed.
5 Attach a lifting strap from a second overhead
crane or other similar lifting device to the
primary boom lift cylinder.
6 Remove the rear turntable cover.
7 Place a 4x4 inch / 10 x 10 cm block between
the lower compression arms and the cross
member of the upper secondary boom.
Carefully lower the secondary boom onto the
block.
Crushing hazard. Keep hands
away from the block and all
moving parts when lowering the
secondary boom.
8 Remove the pin retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin.
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.
9 Lower the rod end of the cylinder onto the
blocks that were placed on the upper
secondary boom.
10 Remove the pin retaining fasteners from the
upper compression arm pivot pin (same side
of machine as the primary boom lift cylinder
barrel-end pivot pin retaining fasteners).
11 Place a rod through the compression arm
pivot pin and twist to remove the pin.
12 Swing the compression arm up out of the way
and secure it from moving.