Primary Boom Lift Cylinder - Genie Z80/60 Service Manual

Section 4 • Repair Procedures
BOOM COMPONENTS
8 Remove the external snap rings from the
extension cylinder rod-end pivot pin at the
platform end of the extension tube.
Crushing hazard. The extension
cylinder could become unbalanced
and fall if not properly supported
when removed from primary boom
extension tube.
9 Use a soft metal drift to remove the pin.
Crushing hazard. The extension
cylinder could become unbalanced
and fall if not properly supported
when removed from primary boom
extension tube.
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 if not properly supported
when removed from primary boom
extension tube.
Note: During removal, the overhead crane strap
will need to be carefully adjusted for proper
balancing.
4 - 36
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 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 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.
Z-80/60
June 2011
REV D
Part No. 88619