Genie TZ-50 Servise Manual

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Genie TZ-50 Servise Manual Manual pdf 68 page image

REV APart No. 84577 Genie TZ-50/30 4 - 19November 2004 Section 4 • Repair Procedures4-1Secondary BoomHow toRemove the Secondary BoomThis procedure requires specificrepair skills, lifting equipment anda suitable workshop. Attemptingthis procedure without these skillsand tools could result in death orserious injury and significantcomponent damage. Dealerservice is required.Follow the disassembly steps to the point requiredto complete the repair. Then re-assemble thesecondary boom by following the disassemblysteps in reverse order.When removing a hose assemblyor fitting, the O-ring on the fittingand/or hose end must be replacedand then torqued to specificationduring installation. Refer to Section2, Hydraulic Hose and FittingTorque Specifications.1 Remove the platform. See 1-1, How toRemove the Platform.2 Remove the jib boom. See 2-1, How toRemove the Jib Boom.3 Remove the primary boom. See 3-2, How toRemove the Primary Boom.Remove the mid-pivot4 Attach a lifting strap of suitable capacity from anoverhead crane to the rod end of the primary liftcylinder. Raise the cylinder to a horizontalposition.5 Remove the pin retaining fasteners securing theprimary lift cylinder barrel end pivot pin.6 Using a soft metal drift, remove the primary liftcylinder barrel end pivot pin. Remove thecylinder from the machine.Crushing hazard. The cylindercould fall if not properly supportedwhen the pivot pin is removed.7 Attach a lifting strap of suitable capacity from anoverhead crane to the mid-pivot. Support themid pivot. Do not apply any lifting pressure.8 Remove the pin retaining fasteners securing thesecondary boom pivot pin at the mid-pivot.9 Remove the pin retaining fasteners securing thesecondary link pivot pin at the mid-pivot.10 Tag, disconnect and plug the hydraulic hoses tothe hydraulic hard lines at the mid-pivot end ofthe secondary boom. Cap the fittings.Bodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil to squirtor spray.Component damage hazard.Cables and hoses can be damagedif they are kinked or pinched.11 Using a soft metal drift, remove the secondaryboom pivot pin at the mid-pivot.Crushing hazard. The mid-pivotcould become unbalanced and fallif not properly supported when thepin is removed.SECONDARY BOOM COMPONENTS