3 - 28 S-100 • S-105 • S-120 • S-125 Part No. 1268494March 2017Section 3 • Repair ProceduresJIB BOOM COMPONENTS, S-105 AND S-125 MODELS3-2Jib Boom Lift Cylinder,S-105 and S-125 ModelsHow to Remove the Jib BoomLift CylinderNote: Perform this procedure with the boom in thestowed position.Note: When removing a hose assembly or fitting,the O-ring on the fitting and/or hose end must bereplaced and then torqued to specification duringinstallation. Refer to Specifications, HydraulicHose and Fitting Torque Specifications.1 Raise the jib boom slightly and place blocksunder the platform mounting weldment. Lowerthe jib boom until the platform is resting on theblocks just enough to support the platform.Note: Do not rest the entire weight of the boom onthe blocks.2 Tag, disconnect and plug the jib boom liftcylinder hydraulic 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.3 Remove the hose and cable cover retainingfasteners from the jib boom leveling arm.Remove the hose and cable cover from themachine.4 Remove the pin retaining fasteners from thejib boom lift cylinder rod-end pivot pin. Do notremove the pin.5 Use a soft metal drift to tap the jib boom liftcylinder rod-end pivot pin half way out andlower one of the leveling arms to the ground.Tap the pin the other direction and lower theopposite leveling arm. Do not remove the pin.6 Support the jib boom lift cylinder with a suitablelifting device.7 Remove the pin retaining fastener from the jibboom lift cylinder barrel-end pivot pin. Use asoft metal drift to remove the barrel-end pivotpin.8 Use a soft metal drift to remove the jib boomlift cylinder rod-end pivot pin. Remove the jibboom lift cylinder from the machine.Crushing hazard. The jib boom liftcylinder may become unbalancedand fall when it is removed fromthe machine if it is not properlysupported.
