4 - 40 Genie TZ-50 Part No. 824982September 2014Section 4 • Repair ProceduresHydraulic Tankcabd9-1Hydraulic TankThe primary functions of the hydraulic tank are tocool and deaerate the hydraulic fluid duringoperation. It has an external return line filter.How to Remove theHydraulic TankComponent damage hazard. Thework area and surfaces where thisprocedure will be performed mustbe clean and free of debris thatcould get into the hydraulicsystem.Note: When removing a hose assembly or fitting,the O-ring (if equipped) on the fitting and/or thehose end must be replaced. All connections mustbe torqued to specification during installation. Referto Section 2,Hydraulic Hose and Fitting TorqueSpecifications.Note: Perform this procedure with the platform inthe stowed position.1 Disconnect the battery pack from the machine.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.2 Remove the drain plug from the hydraulic tankand allow all of the oil from the tank to drain intoa suitable container. Refer to Section 2,Specifications.Bodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil to squirtor spray.3 Tag and disconnect the return hard line from thefilter head. Remove the hard line from themachine. Cap the fitting on the filter head.4 Tag and disconnect the supply hard line fromthe pump. Cap the fitting on the pump.5 Remove the hydraulic tank retaining fastenersand remove the hydraulic tank and supply hardline from the machine.a hydraulic filterb supply hard line (to pump)c hydraulic tankd return hard line (from filter)Torque specificationsHydraulic tank retaining fasteners, dry 35 in-lbs4 NmHydraulic tank retaining fasteners, lubricated 26 in-lbs2.9 Nm