Secondary Boom Extension Cylinder - Genie Z-80/60 Service And Repair Manual

September 2016
12 Tag, disconnect and plug the hydraulic hoses
from the secondary boom lift cylinder. 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.
13 Place blocks under each end of the secondary
boom lift cylinder for support.
14 Remove the pin retaining fasteners from the
secondary boom lift cylinder rod-end pivot pin.
15 Use a soft metal drift to remove the pin.
16 Remove the pin retaining fastener from the
secondary boom lift cylinder barrel-end pivot
pin.
17 Use a soft metal drift to remove the pin.
18 Remove the secondary boom lift cylinder from
the machine by pulling it through the platform
end of the secondary boom.
Crushing hazard. The secondary
boom lift cylinder could become
unbalanced and fall when
removed from the machine if not
properly attached to the
overhead crane.
Component damage hazard.
When removing a secondary
boom lift cylinder from the
machine, be careful not to
damage the counterbalance
valve at the barrel end of the
cylinder.
Component damage hazard.
Cables and hoses can be
damaged if the cylinder is
dragged across them.
Part No. 1268556
Boom Components
4-9
Secondary Boom Extension
Cylinder
The secondary boom extension cylinder extends
and retracts the secondary boom extension tube.
The secondary boom extension cylinder is
equipped with counterbalance valves to prevent
movement in the event of a hydraulic line failure.
How to Remove the Secondary
Boom Extension 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: The secondary boom extension cylinder must
be removed as an assembly with the cable tracks,
cable track trays and cable track support tubes from
the platform end of the secondary boom.
1 Raise the primary boom to a horizontal
position.
2 Remove the access cover from the
counterweight end of the secondary boom.
Service and Repair Manual
57