Service and Repair Manual
December 2019
Platform Components
30
SX
™
-150
Part No. 1300669GT
2-2
Platform Leveling Cylinder
The platform leveling cylinder keeps the platform
level through the entire range of boom motion. The
platform is maintained level to the turntable. To
accomplish this, the ECM at the ground controls
compares the difference in readings between the
platform angle sensor and the turntable level
sensor, which then sends a signal to the platform
controls to open or close the appropriate platform
level proportional valve on the platform manifold to
maintain a level platform. The platform leveling
cylinder is equipped with counterbalance valves to
prevent movement in the event of a hydraulic line
failure.
How to Remove the Platform
Leveling Cylinder
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 jib boom slightly and place blocks
under the platform.
2 Lower the jib boom until the platform is resting
on the blocks just enough to support the
platform.
Note: Do not rest the entire weight of the boom on
the blocks.
3 Secure the platform leveling cylinder to the jib
boom for support.
4 Remove the pin retaining fasteners from the
barrel-end pivot pin. Use a soft metal drift to
remove the barrel-end pivot pin.
5 Support the rod end of the platform level
cylinder.
6 Remove the pin retaining fasteners from the
platform leveling cylinder rod-end pivot pin.
Use a soft metal drift to remove the barrel-end
pivot pin.
7 Carefully pull the platform leveling cylinder out
of the boom to access the hydraulic hoses.
8 Tag, disconnect and plug the hydraulic hoses
from the platform leveling cylinder. 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 platform leveling cylinder from the
machine.
Crushing hazard. The platform
leveling cylinder may fall if not
properly supported when
removed from the machine.
Содержание Genie SX-150
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