Secondary Boom Lift Cylinders - Genie Z-45/25 Bi-Energy Service Manual

July 2004
REV A
52 Remove the secondary boom drive speed limit
switch mounting fasteners from the number 4
arm at the mid-pivot end. Do not disconnect the
wiring.
53 Remove the pin retaining fasteners from the
number 4 arm at the turntable pivot. Do not
remove the pin.
54 Attach a lifting strap from the overhead crane to
the center point of the number 4 arm. Do not
lift it.
55 Use a slide hammer to remove the number 4
arm from the turntable pivot through the ground
controls side bulkhead.
56 Remove the number 4 arm from the machine.
Crushing hazard. The number 4
arm could become unbalanced
and fall when removed from the
machine if not properly supported
by the overhead crane.
Part No. 106488 Genie Z-45/25 Bi-Energy and Genie Z-45/25J Bi-Energy
Section 4 • Repair Procedures
SECONDARY BOOM COMPONENTS
5-2

Secondary Boom Lift Cylinders

There are two secondary boom lift cylinders
incorporated in the structure of the secondary
boom assembly. These cylinders operate in
parallel and require hydraulic pressure to extend
and retract. Each secondary boom lift cylinder is
equipped with a counterbalance valve to prevent
movement in the event of a hydraulic line failure.
How to Remove a Secondary
Boom Lift Cylinder
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 Lower the secondary boom to the stowed
position.
2 Raise the primary boom so that it is above the
secondary boom lift cylinder rod-end pivot pin.
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