Terex Genie Z-60/37 DC Service And Repair Manual

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Contents

December 2018 Service and Repair ManualSecondary Boom ComponentsPart No. 1271125GT Z®-60/37 DC • Z®-60/37 FE 375-1Secondary Boom Lift CylinderThere is one secondary boom lift cylinderincorporated in the structure of the secondary boomassembly. This cylinder requires hydraulic pressureto extend and retract. The secondary boom liftcylinder is equipped with counterbalance valves toprevent movement in the event of a hydraulic linefailure.How to Remove the SecondaryBoom Lift CylinderBodily injury hazard. Thisprocedure requires specific repairskills, lifting equipment and asuitable workshop. Attemptingthis procedure without these skillsand tools could result in death orserious injury and significantcomponent damage. Dealerservice is strongly recommended.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 Raise the secondary boom until the barrel endpivot pins of the secondary lift cylinder clearthe lower tension arms.2 Attach a lifting strap from an overhead crane(5 ton / 5000 kg) to the pivot end of the primaryboom for support. Do not apply lifting pressure.Crushing hazard. The boomassembly can fall if not properlysupported by the overheadcrane.Component damage hazard.Hoses and cables can bedamaged if they are kinked orpinched.3 Remove the pin retaining fasteners securingthe barrel-end pivot pins of the secondaryboom lift cylinder. Do not remove the pins.4 Attach a strap from an overhead crane to thecenter of the secondary boom lift cylinder forsupport. Do not apply lifting pressure.Crushing hazard. The secondaryboom lift cylinder could becomeunbalanced and fall whenremoved from the machine if notproperly attached to theoverhead crane.5 Use a slide hammer to remove the pivot pins.6 Use auxiliary power to retract the cylinder.7 Tag, disconnect and plug the hydraulic hosesfrom the secondary boom lift cylinder. Cap thefittings on 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 tosquirt or spray.