Service and Repair Manual
April 2021
Boom Components
52
S
®
-60/65 XC
™
• S
®
-60/65
HF • S
®
-60/65 TraX
™
Part No. 1288652GT
4-3 Boom Lift Cylinder
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 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.
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.
5 Using auxiliary power, activate the boom
down 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.
6 Tag, disconnect and plug the 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 fasteners from the
boom lift cylinder barrel-end pivot pins. Do not
remove the pins.
8 Use a slide hammer to remove the barrel-end
pivot pins.
Crushing hazard. The lift
cylinder could become
unbalanced and fall if not
properly supported and secured
to the lifting device.
9 Move the boom lift cylinder towards the
counterweight end of the machine. Rotate the
boom lift cylinder until the barrel-end pivot pin
bores will clear the boom linkage.
10 Carefully remove the boom lift cylinder from
the machine.
Crushing hazard. The lift
cylinder could become
unbalanced and fall if not
properly supported and secured
to the lifting device.
Содержание Genie S-60 HF
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