REV BJune 2005 Section 4 • Repair ProceduresPart No. 65162 TMZ-50/30 4 - 17PRIMARY BOOM COMPONENTS4-3Boom ExtensionHow toRemove the Boom ExtensionThis procedure in this sectionrequires specific repair skills, liftingequipment and a suitableworkshop. Attempting thisprocedure without these skills andtools 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 toSection 2, Hydraulic Hose andFitting Torque Specifications.1 Remove the jib. See 3-1, How to Remove theJib Boom.2 Tag, disconnect and plug the platform levelslave cylinder hydraulic hoses. Cap the fittingson the cylinder.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.3 Tag, disconnect and plug the extension cylinderhydraulic 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 to squirtor spray.The connections to the extensioncylinder are at the mid pivot end ofthe primary boom.4 Remove the primary boom upper wear padretaining fasteners. Remove the upper wearpads from the primary boom.5 Remove the primary boom side wear padretaining fasteners. Remove the side wear padsand shims from the primary boom.For ease of assembly, note thequantity and location of shimsduring disassembly.6 Remove the primary boom lower wear padretaining fasteners. Remove the lower wearpads from the primary boom.7 Remove the pin retaining fasteners from theextension cylinder barrel end pivot pin.8 Using a soft metal drift, remove the extensioncylinder barrel end pivot pin.9 Pull the extension boom approximately half wayout of the primary boom.10 Attach a lifting strap of suitable capacity from anoverhead crane to the extension boom. Supportthe boom. Do not apply any lifting pressure.11 Remove the boom extension from the primaryboom. Set it on a suitable structure capable ofsupporting it.Crushing hazard. The boomextension could becomeunbalanced and fall if not properlysupported when removed from themachine.800-610-4101ActionRental.com
