Secondary Boom Lift Cylinders - Genie Z-40/23N Service And Repair Manual

Service and Repair 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 With the secondary boom in the stowed
postion, raise the primary boom until it is
above the secondary boom lift cylinder
rod-end pivot pin.
48
2 Tag, disconnect and plug the hydraulic hoses
on the secondary boom lift cylinder. Cap the
fittings on the cylinder.
3 Remove the pin retaining fasteners from the
secondary boom lift cylinder rod-end pivot pin
and barrel-end pivot pin. Do not remove the
pins.
4 Attach a strap from an overhead crane to the
lug on the rod end of the secondary boom lift
cylinder for support. Do not apply any lifting
pressure.
5 Use a soft metal drift to drive the barrel-end
pivot pin half way out. Lower the barrel end of
the secondary boom lift cylinder and let it hang
down.
6 Use a soft metal drift to drive the rod-end pivot
pin half way out.
7 Remove the secondary boom lift cylinder from
the machine.
Z-40/23N, Z-40/23N RJ
September 2016
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.
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.
Part No. 1268528