Genie Z-45/25 Service Manual

Also see for Z-45/25: Service manual Maintenance manual Operator's manual Operator's manual Service and repair manual

Contents

Genie Z-45/25 Service Manual Manual pdf 401 page image

Part No. 52709 Genie Z-45/25 & Genie Z-45/25J 7 - 53First Edition • Second Printing Section 7 • Repair ProceduresHYDRAULIC PUMPS11-2Drive PumpThe drive pump is a bi-directional variabledisplacement piston pump. The pump output iscontrolled by the electronic displacement controller(EDC), located on the pump. The only adjustmentthat can be made to the pump is the neutral or nulladjustment. Any internal service to the pumpshould only be performed at an authorizedSundstrand-Sauer service center. Call GenieIndustries Service Department to locate your localauthorized service center.How to Remove the Drive PumpComponent damage hazard. Thework area and surfaces where thisprocedure will be performed mustbe clean and free of debris thatcould get into the hydraulic systemand cause severe componentdamage. Dealer service isrecommended.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 Disconnect the electrical connection at theelectronic displacement controller (EDC)located on the drive pump.2 Locate the two hydraulic tank valves at thehydraulic tank through the access holeunderneath the turntable, then close the valves.Component damage hazard. Theengine must not be started withthe hydraulic tank shutoff valves inthe CLOSED position or componentdamage will occur. If the tankvalves are closed, remove the keyfrom the key switch and tag themachine to inform personnel of thecondition.3 Tag and disconnect and plug the hydraulichoses from the drive and lift/steer pumps. Capthe fittings on the pumps.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 Support the pump with a lifting device andremove the two drive pump mounting fasteners.5 Carefully pull the drive pump out until the pumpcoupler separates from the flex plate.open closed