February 2017 Service ManualJib Boom ComponentsPart No. 1259369GT S-80 • S-85 • S-80X 913-1Jib BoomHow to Remove the Jib BoomNote: Perform this procedure with the boom in thestowed position.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 Remove the platform. Refer to RepairProcedure, How to Remove the Platform.Note: Models equipped with platform overloadsystem: If the platform overload components aredisassembled and/or removed from the platformsupport, the platform overload system will need tobe calibrated. Refer to Repair Procedure, How toCalibrate the Platform Overload System.2 Models equipped with platform overloadsystem: Tag and disconnect the electricalconnector from the platform load sensemodule.3 Remove the hose and cable cover from theside of the jib boom.4 Remove the hose and cable clamp from the jibboom pivot pin. Lay all hoses and cables tothe side.Component damage hazard.Cables and hoses can bedamaged if they are kinked orpinched.5 Tag, disconnect and plug the jib boom liftcylinder hydraulic hoses. Cap the fittings onthe cylinder.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.6 Attach a lifting strap from an overhead craneto the jib boom assembly.7 Place blocks under the platform levelingcylinder for support. Protect the cylinder rodfrom damage.8 Remove the pin retaining fastener from theslave cylinder rod-end pivot pin. Use a softmetal drift to remove the pin.Crushing hazard. The jib boomcould fall when the slave cylinderrod-end pivot pin is removed ifnot properly attached to theoverhead crane.9 Remove the pin retaining fastener from the jibboom bellcrank to primary boom pivot pin.10 Use a soft metal drift to remove the pin andcarefully remove the jib boom assembly fromthe primary boom.Crushing hazard. The jib boommay become unbalanced and fallwhen it is removed from themachine if it is not properlysupported by the overheadcrane.
