Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N 4 - 13June 2011 Section 4 • Repair ProceduresREV A3-4Jib Boom Lift CylinderHow to Remove the Jib BoomLift CylinderNote: When removing a hose assembly orfitting, the O-ring on the fitting and/or hose endmust be replaced and then torqued tospecification during installation. Refer toSection 2,Hydraulic Hose and Fitting TorqueSpecifications.1 Raise the jib boom slightly and place blocksunder the platform mounting weldment forsupport. Lower the jib boom until the platform isresting on the 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 pin retaining fasteners from the jibboom lift cylinder rod-end pivot pin. Do notremove the pin.4 Use a soft metal drift to tap the rod-end pivotpin half way out and lower one of the levelinglinks to the ground. Tap the pin the otherdirection and lower the opposite leveling link.Do not remove the pin.5 Attach a lifting strap from an overhead crane tothe rod end of the jib boom lift cylinder.6 Remove the pin retaining fasteners from the jibboom lift cylinder barrel-end pivot pin. Use asoft metal drift to remove the barrel-end pivotpin.7 Use a soft metal drift to remove the jib boom liftcylinder rod-end pivot pin. Remove the jib boomlift cylinder from the machine.Crushing hazard. The jib boom liftcylinder could fall when the pinsare removed if not properlysupported by the overhead crane.JIB BOOM COMPONENTS
