Genie ZX-135/70 Service Manual page 133

Service Manual
Jib Boom Components
4 Extend the jib boom until the jib boom
extension cylinder rod-end pivot pin is
accessible.
5 Tag, disconnect and plug the two hydraulic
hoses from the jib boom manifold that lead to
the platform 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.
6 Tag, disconnect and plug the jib boom lift
cylinder and jib boom extension cylinder
hydraulic hoses from the jib boom 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.
7 Remove the cover from the lower jib boom
cable track.
8 Tag and disconnect the electrical connectors
inside the lower cable track.
9 Remove the hose and cable clamp retaining
fasteners from lower cable track at the pivot
end of the jib boom. Remove the clamps.
118
10 Pull the electrical cables out of the lower cable
track that lead to the primary boom.
11 Attach a lifting strap from a second overhead
crane to the pivot end of the jib boom for
support. Do not apply any lifting pressure.
12 Place a block under the jib boom level
cylinder for support. Protect the cylinder rod
from damage.
13 Remove the pin retaining fastener from the jib
boom pivot pin. Do not remove the pin.
14 Use a soft metal drift to tap the pin halfway
out in one direction and lower one side of the
jib boom bellcrank. Tap the pin in the other
direction and lower the other side of the jib
boom bellcrank.
15 Use a soft metal drift to remove the jib boom
pivot pin. Remove the jib boom from the
machine and place it on a structure capable of
supporting it.
16 Remove the pin retaining fasteners from the
jib boom extension cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin.
ZX-135/70
August 2014
Crushing hazard. The jib boom
may become unbalanced and
fall when it is removed from the
machine if it is not properly
supported by the overhead
crane.
Part No. 218700