Platform Components; Platform; Platform Leveling Cylinder - Genie Z80/60 Service Manual

June 2011
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REV C REV E
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2-1

Platform

How to Remove the Platform
1 Separate the foot switch quick disconnect plug.
2 Support the platform with an appropriate lifting
device.
3 Locate the cables that connect to the bottom of
the control box. Number each cable and its
location at the platform control box.
4 Disconnect the cables from the bottom of the
platform control box.
5 Remove the platform control box mounting
fasteners. Remove the platform control box and
set it aside.
6 Remove the air line to platform bracket retaining
fasteners (if equipped).
7 Remove the weld cables from the platform
(if equipped).
8 Remove the platform mounting fasteners and
remove the platform from the machine.
Crushing hazard. The platform
could become unbalanced and fall
when it is removed from the
machine if it is not properly
supported.
Part No. 88619

Platform Components

2-2

Platform Leveling Cylinder

The platform leveling cylinder maintains platform
leveling through the entire range of boom motion.
This allows the platform to be level with the
turntable. The ECM at the ground controls
compares the difference in readings between the
platform angle sensor and the turntable level
sensor. The ECM at the ground controls 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 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 boom until the platform leveling
cylinder barrel-end pivot pin is accessible.
2 Raise the jib boom slightly and place blocks
under the platform.
Z-80/60
Section 4 • Repair Procedures
4 - 19