Platform Components; Platform Leveling Slave Cylinder; How To Remove The Platform Leveling Slave Cylinder; How To Bleed The Slave Cylinder - Genie S-65 Service Manual

July 2005
REV B
2-1

Platform Leveling Slave Cylinder

The slave cylinder and the rotator pivot are the
two primary supports for the platform. The slave
cylinder keeps the platform level through the
entire range of boom motion. It operates in a
closed-circuit hydraulic loop with the master
cylinder. The slave cylinder is equipped with
counterbalance valves to prevent movement in
the event of a hydraulic line failure.
How to Remove the Platform
Leveling Slave Cylinder
Before cylinder removal is
considered, bleed the slave
cylinder to be sure there is no
air in the closed loop.
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 Extend the primary boom until the slave cylinder
barrel-end pivot pin is accessible.
2 Raise the primary boom slightly and place
blocks under the platform for support.
3 Lower the primary boom until the platform is
resting on the blocks just enough to support the
platform.
Do not rest the entire weight of the
boom on the blocks.
Part No. 77828

Platform Components

4 Remove the pin retaining fastener from the slave
cylinder rod-end pivot pin. Use a soft metal drift
to drive the rod-end pivot pin out.
5 Remove the external snap rings from the barrel-
end pivot pin.
6 Use a soft metal drift to drive the barrel-end
pivot pin out.
7 Carefully pull the cylinder out of the primary
boom to access the hydraulic hoses.
8 Tag, disconnect and plug the hydraulic hoses
from the slave cylinder. Cap the fittings on the
cylinder.

How to Bleed the Slave Cylinder

1 Raise the primary boom to a horizontal position.
2 Move the platform level toggle switch up and
down through two platform leveling cycles to
remove any air that might be in the system.
S-60 • S-65
Section 4 • Repair Procedures
Crushing hazard. The jib boom
could fall when the slave cylinder
rod-end pivot pin is removed if not
properly supported.
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.
Do not start the engine. Use
auxiliary power for this procedure.
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