Secondary Boom Lift Cylinder - Genie Z-30/20N Service Manual

Service Manual
Secondary Boom Components
5-2

Secondary Boom Lift Cylinder

The secondary boom lift cylinder raises and lowers
the secondary boom. The secondary boom lift
cylinder is equipped with counterbalance valves to
prevent movement in the event of a hydraulic line
failure.
How to Remove the Secondary
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 (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.
1 Rotate the turntable to either side until the
boom is centered between the steer and
non-steer tires.
2 Raise the primary boom to full height. Do not
extend it.
3 Swing out the battery pack that is directly
below the secondary boom lift cylinder.
74
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
4 Disconnect the battery packs from the
machine.
5 Open the hydraulic tank side turntable cover.
6 Tag and disconnect the power cables on the
auxiliary power unit.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
7 Close the hydraulic tank shutoff valve. Tag
and disconnect and plug the hydraulic hose
from the hydraulic tank shutoff valve.
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.
8 Open the valve on the hydraulic tank and drain
the oil into a container of suitable capacity.
Refer to Specifications., Machine
Specifications.
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
April 2016
Part No. 139378