Genie S-60 HC, Service Manual

Page: 135 / 461

Part No. 147753 S-60 • S-65 • S-60 TRAX • S-65 TRAX 4 - 29
S-60 HC • S-60X • S-60XC
December 2013 Section 4 • Repair Procedures
4-4
Boom Extension Cylinder
The boom extension cylinder is located inside the
boom assembly and incorporates cables and
pulleys that are responsible for extending the
number 3 boom 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 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 the
hose end must be replaced. All connections must
be torqued to specification during installation. Refer
to Section 2,
Hydraulic Hose and Fitting Torque
Specifications .
Note: Perform this procedure with the boom fully
retracted.
1 Raise the boom to a horizontal position.
2 S-60, S-60X, S-60XC, S-65, S-60 TRAX and
S-65 TRAX: Remove the boom end cover
retaining fasteners and remove the cover.
S-60 HC: Remove the boom end cover from the
pivot end of the boom while guiding the small
cable from the string potentiometer out of the
slot of the cover. Rest the cover and string
potentiometer on the counterweight.
Component damage hazard. The
cable from the string potentiometer
can become damaged if it is
kinked or pinched.
3 S-60 HC: Remove the string potentiometer cable
break limit switch mounting fasteners.
4 S-60 HC: Remove the pulley retaining plate from
the string potentiometer pulley bracket.
Carefully remove the string potentiometer cable
and limit switch assembly from the boom.
5 Remove the access covers from both sides of
the boom at the pivot end.
6 Fully loosen the lock nuts on the extend cables.
Do not remove the nuts.
7 Loosen the retract cable nut at the platform end
of the boom. Pull the cable rod from the support
and let it hang down.
BOOM COMPONENTS