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Part No. 52709
Genie Z-45/25 & Genie Z-45/25J
7 - 31
First Edition • Second Printing
Section 7 • Repair Procedures
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 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.
When removing a hose assembly
or fitting, the O-ring on the fitting
and/or hose end must be replaced
and then torqued to specification
during installation.
Refer to Section Two,
Hydraulic
Hose and Fitting Torque
Specifications.
1 Raise the primary boom to a horizontal position.
2 Extend the primary boom until the primary
boom extension cylinder rod-end pivot pin is
accessible in the primary boom extension tube.
3 Remove the hose and cable guard from the
upper pivot.
4 Tag, disconnect and plug the primary boom
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.
5 Remove the external snap rings from the
extension cylinder rod-end pivot pin (at the
platform end). Use a soft metal drift to remove
the pin.
6 Remove the barrel-end pivot pin retaining
fasteners.
PRIMARY BOOM COMPONENTS
Содержание Z-45 XC
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