Jib Boom Rotator - Genie Z-25/8 Service Manual

First Edition • Third Printing
5 Use a soft metal drift to tap the rod-end pivot
pin half way out. Then lower one leveling arm
to the ground. Tap the pin the opposite
direction and lower the other leveling arm. Do
not remove the pin.
6 Support the barrel end of the jib boom lift
cylinder with an overhead crane.
7 Support the jib boom with a lifting device at the
platform end.
8 Remove the pin retaining fasteners from the jib
boom lift cylinder barrel-end pivot pin. Use a
soft metal drift to remove the barrel-end pivot
pin.
Crushing hazard. The jib boom
could fall when pin is removed if it
is not properly supported.
9 Lower the barrel end of the jib boom lift
cylinder.
10 Attach a strap from an overhead crane to the
lug on the rod end of the jib boom cylinder.
11 Use a soft metal drift to remove the jib boom lift
cylinder rod-end pin. Remove the cylinder from
the machine.
Crushing hazard. The jib boom lift
cylinder will fall when it is removed
if it is not properly supported.
Part No. 41314 Genie Z-20/8N & Genie Z-20/8 & Genie Z-25/8
Section 7 • Repair Procedures
3-3

Jib Boom Rotator

The jib boom rotator is a hydraulically activated
helical gear assembly used to rotate the jib boom
180 degrees.
How to Remove the
Jib Boom Rotator
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 Two, Hydraulic
Hose and Fitting Torque
Specifications.
1 Remove the platform. See 2-1,
How to Remove the Platform.
2 Remove the jib boom. See 3-1,
How to Remove the Jib Boom.
3 Tag, disconnect and plug the hydraulic hoses
from the jib boom rotator manifold. Cap the
fittings on the manifold.
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.
JIB BOOM COMPONENTS
7 - 13