Terex Genie Z-34/22DC, Service Manual

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April 2016 Service Manual
Primary Boom Components
Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22
• Z-34/22N
63
6 Support and slide the extension tube out of the
primary boom tube. Place the extension tube
on blocks for support.
Note: During removal, the overhead crane strap will
need to be adjusted for proper balancing.
7 Remove the external snap rings from the slave
cylinder barrel-end pivot pin.
8 Use a soft metal drift and drive the slave
cylinder barrel-end pivot pin out.
9 Remove the slave cylinder from the primary
extension boom tube.
10 Remove the external snap rings from the
extension cylinder rod-end pivot pins at the
platform end of the extension tube. Use a soft
metal drift to remove the pins.
11 Support and slide the extension cylinder out of
the pivot end of the boom extension tube.
Place the extension cylinder on blocks for
support.
Note: During removal, the overhead crane strap will
need to be adjusted for proper balancing.
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 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 secondary boom enough to access
the primary boom lift cylinder barrel-end pivot
pin.
2 Raise the primary boom enough to access the
primary boom lift cylinder rod-end pivot pin.