REV CSection 4 • Repair Procedures June 20054 - 10 TMZ-34/19 Part No. 520753-2Jib Boom CylinderThe jib boom lift cylinder raises and lowers the jibboom. The jib boom lift cylinder is equipped with abi-directional solenoid valve to prevent movementin the event of a hydraulic line failure.JIB BOOM COMPONENTSHow toRemove the Jib Boom CylinderWhen removing a hose assemblyor fitting, the O-ring on the fittingand/or hose end must be replacedand then torqued to specificationduring installation. Refer toSection 2, Hydraulic Hose andFitting Torque Specifications.1 Raise the jib boom approximately 3 feet / 1 m.2 Lower the jib boom until the platform mountrests on sawhorses or a work table of sufficientcapacity.3 Disconnect the battery pack from the machine.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.4 Tag, disconnect and plug the hydraulic hoses atthe jib boom cylinder. 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.5 Tag and disconnect the wires from the jib boomcylinder solenoid valve.a primary boomb primary linkagec jib boom mountd upper jib boome jib boom cylinder barrel-end pivot pinf jib boom lift cylinderg lower jib boomh jib boom cylinder rod-end pivot pini platform mountbidfecagh800-610-4101ActionRental.com
