Genie TZ-50 Servise Manual

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Genie TZ-50 Servise Manual Manual pdf 70 page image

REV APart No. 84577 Genie TZ-50/30 4 - 21November 2004 Section 4 • Repair Procedures43 Remove the pin retaining fasteners securing thesecondary link pivot pin to the turntable.44 Using a soft metal drift, remove the secondarylink pivot pin.Crushing hazard. The secondarylink could become unbalanced andfall if not properly supported whenthe pin is removed.45 Release the latch at the tongue end of themachine.46 Remove the secondary link from the machine.Crushing hazard. The secondarylink could become unbalanced andfall if not properly supported whenremoved from the machine.47 Tag, disconnect and plug the hoses from thesecondary lift cylinder. Cap the fittings on thecylinder.48 Attach a lifting strap of suitable capacity from anoverhead crane to the secondary lift cylinder.Raise the cylinder to a horizontal position.49 Remove the pin retaining fasteners securing thesecondary lift cylinder pivot pin to the mid-pivot.50 Using a soft metal drift, remove the secondarylift cylinder pivot pin. Remove the cylinder fromthe machine.Crushing hazard. The cylindercould fall if not properly supportedwhen the pivot pin is removed.4-2Secondary Boom Lift CylinderThe secondary boom lift cylinder raises and lowersthe secondary boom. The secondary boom liftcylinder is equipped with a counterbalance valve toprevent movement in the event of a hydraulic linefailure.1 Release the boom latch at both the tongue endand turntable end of the boom.2 Raise the secondary boom to a horizontalposition.3 Attach a lifting strap of suitable capacity from anoverhead crane to the mid-pivot. Support themid-pivot. Do not apply any lifting pressure.4 Attach a lifting strap of suitable capacity from anoverhead crane to the lift cylinder. Support thecylinder. Do not apply any lifting pressure.5 Remove the pin retaining fasteners securing thelift cylinder rod end pivot pin.6 Place a wooden block between the secondarylink and the lift cylinder.7 Using a soft metal drift, remove the lift cylinderpivot pin.Crushing hazard. The cylindercould fall if not properly supportedwhen the pivot pin is removed.8 Lower the cylinder onto the wooden block.9 Rotate the rod end of the secondary boom liftcylinder approximately 90°.10 Raise the cylinder slightly, remove the block andlower the cylinder through the secondary linkand onto the front bulkhead.SECONDARY BOOM COMPONENTS