April 2016 Service ManualPrimary Boom ComponentsPart No. 139234 Z-34/22 Bi-Energy 7510 Carefully pull out and properly support theextension cylinder from the primary boomusing a lifting strap from an overhead crane.Crushing hazard. The extensioncylinder could fall when removedfrom the extension boom if notproperly supported.Component damage hazard. Becareful not to damage thecounterbalance valves on theprimary boom extension cylinderwhen removing the cylinder fromthe primary boom.Component damage hazard.Hoses and cables can bedamaged if the primary boomextension cylinder is draggedacross them.Note: During removal, the overhead crane strap willneed to be carefully adjusted for proper balancing.Note: Note the length of the cylinder after removal.The cylinder must be at the same length forinstallation.4-5Platform Leveling MasterCylinderThe platform leveling master cylinder acts as apump for the slave cylinder. It is part of theclosed-loop hydraulic circuit that keeps the platformlevel through the entire range of primary boommotion. The platform leveling master cylinder islocated inside the upper mid-pivot at the pivot endof the primary boom.How to R emove the Pl atform Lev eling M aster CylinderHow to Remove the PlatformLeveling Master 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.Note: Before cylinder removal is considered, bleedthe cylinder to be sure that there is no air in theclosed loop. Refer to Repair Procedure, How toBleed the Slave Cylinder.
