Jib Boom Lift Cylinder - Genie Z80/60 Service Manual

Section 4 • Repair Procedures
JIB BOOM COMPONENTS
3-2

Jib Boom Lift Cylinder

How to Remove the Jib Boom
Lift Cylinder
Note: Perform this procedure with the boom in the
stowed position.
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 jib boom slightly and place blocks
under the platform mounting weldment. Lower
the jib boom until the platform is resting on the
blocks just enough to support the platform.
Note: Do not rest the entire weight of the boom on
the blocks.
2 Tag, disconnect and plug the jib boom lift
cylinder hydraulic hoses. Cap the fittings on the
cylinder.
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.
4 - 28
3 Remove the pin retaining fasteners from the jib
boom lift cylinder rod-end pivot pin. Do not
remove the pin.
4 Use a soft metal drift to tap the jib boom lift
cylinder rod-end pivot pin half way out and
lower one of the leveling arms to the ground.
Tap the pin the other direction and lower the
opposite leveling arm. Do not remove the pin.
Crushing hazard. The jib boom lift
cylinder may fall if not supported
when the rod-end pivot pin is
removed.
5 Support the jib boom lift cylinder with a suitable
lifting device.
6 Remove the pin retaining fastener from the jib
boom lift cylinder barrel-end pivot pin. Use a
soft metal drift to remove the barrel-end pivot
pin and let the cylinder hang down.
Crushing hazard. The platform
and jib boom lift cylinder could
become unbalanced and fall if not
properly supported when the jib
boom lift cylinder barrel-end lift
pivot pin is removed.
7 Place blocks under the platform leveling
cylinder for support. Protect the cylinder from
damage.
8 Use a soft metal drift to remove the jib boom lift
cylinder rod-end pivot pin. Remove the jib boom
lift cylinder from the machine.
Crushing hazard. The jib boom lift
cylinder could become unbalanced
and fall if not properly supported
when removed from the machine.
Z-80/60
June 2011
REV B
Part No. 88619