Genie GR-12 Service Manual

Contents

Genie GR-12 Service Manual Manual pdf 68 page image

Section 4 • Repair ProceduresREV BNovember 20054 - 20 GR-12 • GR-15 • GR-20 Part No. 84700MAST COMPONENTS3-4Lift CylinderThe lift cylinder is equipped with a normally closedsolenoid valve to prevent movement in the event ofa hydraulic line failure.How to Remove the Lift CylinderBodily injury hazard. Thisprocedure requires specific repairskills, lifting equipment and asuitable workshop. Attempting thisprocedure without these skills andtools could result in death orserious injury and significantcomponent damage. Dealerservice is strongly recommended.When removing a hose assemblyor fitting, the O-ring on the fittingand/or hose end must be replacedand then torqued to specificationduring installation.Refer to Section Two, HydraulicHose and Fitting TorqueSpecifications.1 Remove the mast. See 3-1, How to Remove theMast Assembly.2 Rotate the mast until the carriage is facingdown.3 Remove the socket head retaining fastenerfrom the clevis block on the lift cylinder rod endat the top of the number 1 column.4 Remove the lift cylinder barrel end mountingfasteners.5 Loosen the lift cylinder mounting bracketfasteners.6 Support the cylinder and carefully slide it out ofthe mast assembly.Crushing hazard. The lift cylindercould become unbalanced and fallif not properly supported whenremoved from the mast.acbda top of number 1 columnb clevis block (not shown)c clevis block fastenerd lift cylinder (not shown)e check valvef flow controlg cylinderh manual lowering valvehfe gMLN