Service and Repair Manual September 2018Repair Procedures52 S® -60 XC ™ • S® -65 XC ™ Part No. 1288652GT4-3Boom Lift CylinderThe boom lift cylinder raises and lowers the boom.The boom lift cylinder is equipped withcounterbalance valves to prevent movement in theevent of a hydraulic line failure.How to Remove the Boom LiftCylinderBodily injury hazard. Thisprocedure requires specific repairskills, lifting equipment and asuitable workshop. Attemptingthis procedure without these skillsand tools could result in death orserious injury and significantcomponent damage. Dealerservice is strongly recommended.Note: When removing a hose assembly or fitting,the O-ring (if equipped) on the fitting and/or hoseend must be replaced. All connections must betorqued to specification during installation. Refer toSpecifications, Hydraulic Hose and Fitting TorqueSpecifications.1 Raise the boom to a horizontal position.2 Attach a 5 ton / 5000 kg overhead crane to theboom at the platform end for support. Do not liftthe boom.3 Support and secure both ends of the boom liftcylinder to a second overhead crane or similarlifting device.4 Remove the pin retaining fastener from theboom lift cylinder rod-end pivot pin. Use a softmetal drift to remove the pin.Crushing hazard. The boom willfall if not properly supportedwhen the primary boom rod-endpivot pin is removed.5 Using auxiliary power, activate the boom downfunction so the cylinder will retract. Retract thecylinder just enough until the rod end of thecylinder will clear the mounting bracket on theboom. Turn the machine off.6 Tag, disconnect and plug the boom lift cylinderhydraulic hoses. Cap the fittings on thecylinder.Bodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil tosquirt or spray.7 Remove the pin retaining fasteners from theboom lift cylinder barrel-end pivot pins. Do notremove the pins.
