Part No. 34032 Genie S-80 & Genie S-85 7 - 21Service Manual - First Edition Section 7 - Repair ProceduresBOOM COMPONENTS4-5Platform LevelingMaster CylinderThe master cylinder acts as a pump for the slavecylinder. It’s part of the closed circuit hydraulicloop that keeps the platform level through theentire range of boom motion. The master cylinderis located at the base of the boom.How to Remove the PlatformLeveling Master Cylinder1 Raise the boom until the rod-end pivot pin isaccessible.2 Remove the turntable end cover to access themaster cylinder.3 Tag, disconnect and plug the master 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 tosquirt or spray.4 Remove the pin retaining fasteners from bothmaster cylinder pins.5 Use a soft metal drift to remove the pins.4 Remove the platform. See 2-1, How to Removethe Platform.5 Remove the platform leveling slave cylinder.See 2-2, How to Remove the Slave Cylinder.S-85 Models: Remove the jib boom. See 3-1,How to Remove the Jib Boom.6 Raise the boom to a horizontal position.7 Remove the snap rings from the extensioncylinder rod-end pin (at the platform end). Usea soft metal drift to remove the pin.8 Remove the turntable end cover.9 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 tosquirt or spray.10 Remove the pin retaining fasteners from bothsides of the extension cylinder at the base endof the boom.11 Use a slide hammer to remove the pins.12 Support and slide the extension cylinder out ofthe boom.Crushing hazard. The extensioncylinder will fall when it is removedfrom the extension boom if it isnot properly supported.Note the length of the cylinderafter removal. The cylinder mustbe at the same length forinstallation.
