January 2020
Part No. 1268514GT
Z
®
-33/18
3-23
Section 3 • Repair Procedures
The extension cylinder extends and retracts the
primary boom extension tube. The extension
cylinder is equipped with counterbalance valves to
prevent movement in the event of a hydraulic line
failure.
WARNING
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 2,
Hydraulic Hose
and Fitting Torque Specifications
.
1 Remove the platform. See 2-2,
How to Remove
the Platform
.
2 Raise the primary boom to a horizontal
position.
3 Completely extend the extension cylinder.
4 Support the extension tube with an overhead
crane at the platform end of the boom.
5 Tag, disconnect and plug the primary boom
extension cylinder hydraulic hoses, barrel-end.
Cap the fittings on the cylinder.
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.
6 Remove the pin retaining fasteners from the
primary boom extension cylinder barrel-end
pivot pin. Use a soft metal drift to remove the
pin.
WARNING
Crushing hazard. The primary
boom will fall if not properly
supported when the primary
boom rod-end pivot pin is
removed.
7 Support and slide the extension tube and
extension cylinder assembly out of the boom
tube.
WARNING
Crushing hazard. The primary
boom extension tube could
become unbalanced and fall
when removed from the primary
boom tube if not properly
supported.
During removal, the overhead crane strap will
need to be carefully adjusted for proper balancing.
PRIMARY BOOM COMPONENTS
Содержание Genie Z-33/18
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