7 - 38 Genie Z-45/22 Part No. 32960Service Manual - Second EditionSection 7 - Repair ProceduresHYDRAULIC PUMPSHow to Remove theLift/Steer Pump1 Close the two hydraulic tank valves located atthe hydraulic tank.Component damage hazard. Theengine must not be started withthe hydraulic tank shutoff valvesin the CLOSED position orcomponent damage will occur.If the tank valves are closed,remove the key from the keyswitch and tag the machine toinform personnel of the condition.2 Disconnect and plug the lift/steer pumphydraulic hoses. Cap the fittings.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.3 Remove the pump mounting bolts. Carefullyremove the pump.Component damage hazard.Be sure to open the two hydraulictank valves and prime the pumpafter installing the pump.9-2Drive Hydraulic PumpThe drive hydraulic pump is a bi-directionalvariable displacement piston pump. The pumpoutput is controlled by the electronic displacementcontroller (EDC), located on the pump. The onlyadjustment that can be made to the pump is theneutral or null adjustment. Any internal service tothe pump should only be performed at anauthorized Sundstrand-Sauer service center.How to Remove the DriveHydraulic PumpComponent damage hazard. Thework area and surfaces where thisprocedure will be performed mustbe clean and free of debris thatcould get into the hydraulicsystem and cause severecomponent damage. Dealerservice is recommended.1 Disconnect the electrical connection at theelectronic displacement controller (EDC)located on the drive pump.2 Close the two hydraulic tank valves located atthe hydraulic tank.Component damage hazard. Theengine must not be started withthe hydraulic tank shutoff valvesin the CLOSED position orcomponent damage will occur. Ifthe tank valves are closed,remove the key from the keyswitch and tag the machine toinform personnel of the condition.open closedopen closed800-610-4101ActionRental.com
