Secondary Boom Lift Cylinder - Genie TZ-34/20 Service Manual

January 2016
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Secondary Boom Lift Cylinder

The primary boom lift cylinder raises and lowers
the primary boom. The primary boom lift cylinder
is equipped with a bi-directional solenoid valve to
prevent movement in the event of a hydraulic line
failure.
How to Remove the
Secondary Boom Lift Cylinder
Note: When removing a hose assembly or fi tting,
the O-ring on the fi tting and/or hose end must be
replaced and then torqued to specifi cation during
installation.
Refer to Section 2, Hydraulic Hose and Fitting
Torque Specifi cations.
Note: Perform this procedure on a fi rm, level
surface, with the boom in the stowed position.
1 Tag, disconnect and plug the hydraulic hoses
on the lift cylinder. Cap the fi ttings 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.
Part No. 825934
SECONDARY BOOM COMPONENTS
2 Attach a lifting strap of suitable capacity from
an overhead crane to the lift cylinder.
3 Remove the pin retaining fastener from the lift
cylinder rod-end pivot pin.
4 Place a rod through the hole in the outrigger
pivot pin and twist to remove the pin.
5 Lower the cylinder to a horizontal position.
6 Remove the pin retaining fastener from the lift
cylinder barrel-end pivot pin.
7 Place a rod through the hole in the outrigger
pivot pin and twist to remove the pin.
8 Carefully remove the cylinder from the machine.
Genie TZ-34/20
Section 4 • Repair Procedures
Crushing hazard. The lift cylinder
will fall if not properly supported
when the pivot pin is removed.
Crushing hazard. The lift cylinder
will fall if not properly supported
when the pivot pin is removed.
Crushing hazard. The lift cylinder
could become unbalanced and
fall if not properly supported when
removed from the machine.
Component damage hazard. The
solenoid valve can be damaged.
Use caution when removing the
cylinder from the machine.
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