Primary Boom Lift Cylinder - Genie Z-60/34 Service Manual

Section 4 • Repair Procedures
PRIMARY BOOM COMPONENTS
4-3

Primary Boom Lift Cylinder

How to Remove the
Primary 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 result in death or serious
injury and significant component
damage. Dealer service is strongly
recommended.
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 Raise the primary boom enough to access the
primary boom lift cylinder rod-end pivot pin.
2 Attach a 5 ton/5,000 kg overhead crane to the
primary boom for support. Do not lift the boom.
3 Place a 24 inch/61 cm long block of wood
across the lower secondary boom leveling links
to support the primary boom lift cylinder when
the rod-end pivot pin is removed.
4 - 20
4 Support the rod end of the primary boom lift
cylinder with an appropriate lifting device.
5 Remove the pin retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Then use a soft metal drift to remove the pin.
6 Lower the rod end of the cylinder onto the block
that was placed on the lower secondary boom
leveling links. Then lower the primary boom
onto the boom rest.
7 Raise the secondary boom enough to access
the primary boom lift cylinder barrel-end
pivot pin.
8 Tag, disconnect and plug the hydraulic hoses
from the primary boom lift cylinder. Cap the
fittings on the cylinder.
9 Place another 24 inch/61 cm long block of wood
across the lower secondary boom leveling links
to support the primary boom lift cylinder when
the barrel-end pivot pin is removed.
10 Support the barrel end of the primary boom lift
cylinder with an appropriate lifting device.
Genie Z-60/34
November 2003
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.
Part No. 75861
REV A