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

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Service and Repair Manual October 2021
Primary Boom Components
30 Z ® -34/22 Bi-Energy Part No. 1268515GT
4-4
Primary Boom Extension
Cylinder
The primary boom extension cylinder extends and
retracts the primary boom extension tube. The
primary boom extension cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Re mov e th e Prim ary Bo om Ext ensio n Cylind er How to Remove the Primary
Boom Extension 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 to a horizontal
position. Then extend the boom
approximately 3 to 4 feet / 1 m until the
extension cylinder rod-end pivot pins are
accessible.
2 Remove the external snap rings from the
extension cylinder rod-end pivot pins. Use a
soft metal drift to remove the pins.
3 Remove the rear turntable cover.
4 Raise the secondary boom until the master
cylinder rod-end pivot pin is accessible.
5 Remove the drive speed limit switch from the
pivot end of the primary boom. Do not
disconnect the wiring.
6 Remove the pin retaining fasteners from the
master cylinder rod end pivot pin. Use a soft
metal drift to remove the pin.
7 Manually retract the master cylinder and push
it toward the platform end of the boom to
obtain enough clearance for the extension
cylinder removal.
8 Tag, disconnect and plug the extension
cylinder hydraulic hoses. Cap the fittings on
the cylinder.
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 Remove the pin retaining fasteners from the
extension cylinder pivot pin. Use a soft metal
drift to remove the pin.