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

Service and Repair Manual
Boom Components
5 Place blocks under the primary boom lift
cylinder linkage arms for support.
6 Tag, disconnect and plug the primary boom lift
cylinder hydraulic hoses. 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.
7 Remove the pin retaining fastener from the
primary boom lift cylinder rod-end pivot pin.
8 Use a soft metal drift to remove the pin.
Crushing hazard. The primary
boom 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 primary
boom lift cylinder linkage arms
may fall if not properly supported
when the pivot pin is removed.
9 Remove the primary boom lift cylinder
barrel-end pivot pin retaining fasteners.
10 Use a soft metal drift to remove the barrel-end
pivot pin. Remove the primary boom lift
cylinder from the machine.
Crushing hazard. The lift cylinder
will become unbalanced and fall
if not properly supported when
the pin is removed.
48
4-4

Primary Boom Extension Cylinder

The primary boom extension cylinder extends and
retracts the primary boom extension tube.The
primary boom extension cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the Primary
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: Perform this procedure with the machine on a
firm, level surface and in the stowed position with
the axles extended.
1 Raise the primary boom to a horizontal
position.
2 Extend the primary boom until the primary
boom extension cylinder rod-end pivot pin is
accessible.
September 2016
Part No. 1268556