Section 3 • Scheduled Maintenance Procedures January 20133 - 38 GS-84 • GS-90 Part No. 84793CHECKLIST D PROCEDURESD-5Test the Oscillate Axle -GS-90 ModelsGenie specifications require that this procedure beperformed every 1000 hours or annually, whichevercomes first.The oscillate system is designed so that all fourtires maintain firm contact to the ground on unlevelterrain improving traction and machine stability.Proper axle oscillation is essential to safe machineoperation. If the axle oscillation system is notoperating correctly, the stability of the machine iscompromised and it may tip over.Note: Perform this procedure on a firm, levelsurface with the platform in the stowed position in asafe, secure location away from obstacles and withan area working height of 20 feet.Note: The outriggers must be fully retracted ifequipped.1 Disconnect and remove the platform controllerfrom the platform.2 Open the ground control panel door and locatethe cable connector below the ground controls.Unplug the control cable from the ground controlplug and connect the platform controller to thecable.3 Remove the two retaining fasteners from theground control panel and set aside. Tilt thecontrol panel out towards you exposing thewiring and relays.Test the down limit switch and relay K11Note: Perform this test using the platform controlswhile standing on the ground as described below.4 At the ground controls, turn the key switch toplatform controls and pull out the redEmergency Stop button.5 Pull out the red Emergency Stop button on theplatform controller and start the engine.6 Using a volt meter, check for voltage byconnecting the positive lead to relay K11,terminal 30 and connecting the negative lead tothe ground strip terminal.Result: The volt meter should read 12V DC orgreater.Result: The volt meter reads 0V DC. Check thedown limit switch LS6.a down limit switch LS6b load sense delay LS25(CE models only)GROUND CONTROL SIDEHYDRAULIC TANK SIDEab
