December 2019
Service and Repair Manual
Boom Components
Part No. 1300669GT
SX
™
-150
55
14 Remove the pin retaining fastener from the
barrel-end pivot pin. Do not remove the pin.
15 Support the boom lift cylinder with an
overhead crane.
16 Use a slide hammer to remove the boom lift
cylinder barrel-end pivot pin through the
access hole in the engine side turntable riser.
17 With the boom lift cylinder being supported by
the overhead crane, pull the boom lift cylinder
toward the platform until it is out.
Crushing hazard. The boom lift
cylinder may become
unbalanced and fall if it is not
properly supported when it is
removed from the machine.
Component damage hazard. Be
careful not to damage the
proximity and/or limit switches
when removing the boom lift
cylinder.
Component damage hazard.
The cables and hydraulic hoses
can be damaged if the boom lift
cylinder is pulled across them.
4-4
Extension Cylinder
The primary boom extension cylinder is located
inside the boom assembly and incorporates cables
and pulleys that are responsible for extending the
boom tubes. The 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 boom to a horizontal position and
fully retract the primary extension cylinder.
2 Remove the retaining fasteners from the boom
end cover at the pivot end of the boom.
Remove the cover from the machine.
Содержание Genie SX-150
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