Genie S-40 Service Manual page 118

Section 4 • Repair Procedures
BOOM COMPONENTS
4-4
Extension Cylinder
The extension cylinder extends and retracts the
boom extension tube. The extension cylinder is
equipped with counterbalance valves to prevent
movement in the event of a hydraulic line failure.
How to Remove the
Extension Cylinder
This procedure requires specific
repair skills, lifting equipment and
a suitable workshop. Attempting
this procedure without these skills
and tools could cause death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
Note: 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 Extend the boom until the extension cylinder
rod-end pivot pins are accessible in the
extension tube.
2 Remove the master cylinder. See 4-5, How to
Remove the Master Cylinder.
3 Raise the boom to a horizontal position.
4 Remove the external snap rings from the
extension cylinder rod-end pins (at the platform
end). Use a soft metal drift to remove the pins.
5 Remove the turntable end cover.
4 - 22
6 Tag, disconnect and plug the extension cylinder
7 Remove the barrel-end pivot pin retaining
8 Place a rod through the barrel-end pivot pin and
9 Support and slide the extension cylinder out of
Note: Note the length of the cylinder after removal.
The cylinder must be at the same length for
installation.
S-40 • S-45 • S-40 TRAX • S-45 TRAX
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.
fasteners.
twist to remove the pin.
the pivot end of the boom.
Crushing hazard. The extension
cylinder will fall when it is removed
from the extension boom if it is not
properly supported.
February 2014
Part No. 826364