Primary Boom Lift Cylinder - Genie Z-80/60 Service And Repair Manual

September 2016
9 Use a soft metal drift to remove the pin.
Crushing hazard. The extension
cylinder could become
unbalanced and fall when
removed from primary boom
extension tube if not properly
supported.
10 Attach a lifting strap from an overhead crane to
the extension cylinder.
11 Working at the end of the extension boom tube
opposite the jib boom mount, support and slide
the extension cylinder out of the extension
boom tube.
Crushing hazard. The extension
cylinder could become
unbalanced and fall when
removed from primary boom
extension tube if not properly
supported.
Note: During removal, the overhead crane strap will
need to be carefully adjusted for proper balancing.
Part No. 1268556
Boom Components
4-3

Primary Boom Lift Cylinder

The primary boom lift cylinder raises and lowers the
primary boom. The primary boom lift cylinder is
equipped with a counterbalance valve to prevent
movement in the event of a hydraulic line failure.
How to Remove the Primary
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.
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.
Note: Perform this procedure with the boom in the
stowed position.
1 Raise the primary boom to a horizontal
position.
2 Raise the secondary boom until the primary
boom lift cylinder rod-end pivot pin is above the
counterweight.
3 Attach a 5 ton / 5000 kg overhead crane to the
platform end of the primary boom. Support the
boom. Do not apply any lifting pressure.
4 Support both ends of the primary boom lift
cylinder with a second overhead crane or
similar lifting device.
Service and Repair Manual
47