REV ASection 4 • Repair ProceduresPart No. 82259 GS-3384 4 - 83September 2005FUEL AND HYDRAULIC TANKS8-2Hydraulic TankThe primary functions of the hydraulic tank are tocool, clean and deaerate the hydraulic fluid duringoperation. It utilizes internal suction strainers forthe pump supply lines and has an external returnline filter with a filter condition indicator.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.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 Turn the key switch to ground control and pullout the red Emergency Stop buttons to the ONposition at both the ground and platformcontrols.2 Start the engine and raise the platformapproximately 18 feet / 5.5 m from the ground.3 Release the safety arm latch, lift the safety armand rotate to a vertical position. Lock the safetyarm in position.Be sure that the safety arm islocked in the vertical position.4 Lower the platform onto the safety arm. Turnthe engine off.Crushing hazard. Keep handsclear of the safety arm whenlowering the platform.5 Attach a lifting strap from an overhead crane tothe entry ladder on the hydraulic tank side ofthe machine.6 Remove the entry ladder mounting fasteners.Remove the entry ladder from the machine.Crushing hazard. The entry laddercould become unbalanced and fallwhen it is removed from themachine if it is not properlysupported.7 Remove the retaining fasteners from the accessplate located behind the hydraulic and fuel tanktray.8 Close the two hydraulic shutoff valves locatedat the hydraulic tank (if equipped).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.open closed
