Boom Lift Cylinder - Genie S-60 TraX Service Manual

Section 4 • Repair Procedures
BOOM COMPONENTS
4-3

Boom Lift Cylinder

The boom lift cylinder raises and lowers the boom.
The boom lift cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the Boom
Lift 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 .
1 Raise the boom to a horizontal position.
2 Attach a 5 ton / 5000 kg overhead crane to the
boom at the platform end for support. Do not lift
the boom.
3 Support and secure both ends of the boom lift
cylinder to a second overhead crane or similar
lifting device.
4 Remove the pin retaining fastener from the
boom lift cylinder rod-end pivot pin. Use a soft
metal drift to remove the pin.
Crushing hazard. The boom will fall
if not properly supported when the
primary boom rod-end pivot pin is
removed.
4 - 28
5 Using auxiliary power, activate the boom down
6 Tag, disconnect and plug the boom lift cylinder
7 Remove the pin retaining fasteners from the
8 Use a slide hammer to remove the barrel-end
9 Move the boom lift cylinder towards the
10 Carefully remove the boom lift cylinder from the
S-60 • S-65 • S-60 TRAX • S-65 TRAX
S-60 HC • S-60X • S-60XC
function so the cylinder will retract. Retract the
cylinder just enough until the rod end of the
cylinder will clear the mounting bracket on the
boom. Turn the machine off.
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.
boom lift cylinder barrel-end pivot pins. Do not
remove the pins.
pivot pins.
Crushing hazard. The boom lift
cylinder could become unbalanced
and fall if not properly supported
and secured to the lifting device.
counterweight end of the machine. Rotate the
boom lift cylinder until the barrel-end pivot pin
bores will clear the boom linkage.
machine.
Crushing hazard. The boom lift
cylinder could become unbalanced
and fall if not properly supported
and secured to the lifting device.
December 2013
Part No. 147753