Terex Genie Z-40/23N, Service And Repair Manual

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Service and Repair Manual September 2016
Primary Boom Components
40 Z-40/23N, Z-40/23N RJ Part No. 1268528
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.
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 in the primary boom extension
tube.
3 Remove the hose and cable guard from the
upper pivot.
4 Tag, disconnect and plug the primary boom
extension 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.
5 Locate the primary extension boom drive
speed limit switch inside the extension boom
at the pivot end.
6 Remove the primary extension boom drive
speed limit switch mounting fasteners. Do not
disconnect the wiring.
7 Pull the limit switch and the wiring out of the
extension tube and move it out of the way.
8 At the platform end of the boom, remove the
external snap rings from the extension
cylinder rod-end pivot pin. Use a soft metal
drift to remove the pin.
9 Remove the barrel-end pivot pin retaining
fasteners.
10 Place a support block under the barrel end of
the primary boom extension cylinder.
11 Use a slide hammer to remove the pin.