Service and Repair Manual September 2016Ground Controls50 GS-84 • GS-90 Part No. 1272222Ground C ontrols5-1 Auxiliary Platform Loweri ng5-1Auxiliary Platform LoweringIn the event of an engine failure, activating thebackup manual lowering and manual loweringenable switches will lower the platform when thered Emergency Stop buttons are pulled out to theon position at both the ground and platformcontrols. The auxiliary down switches/buttons arelocated at the ground control panel. There is noadjustment required.One 12V DC battery is used to start the engine,power the auxiliary pump and the ECM. Thebattery is located behind the ground control doorassembly.5-2 C ontroll er Adjustm ents5-2Controller AdjustmentsAll machine function speeds are determined by thepercentage of total ECM voltage output. Thespeeds of the following machine functions may beadjusted to compensate for wear in the hydraulicpump and drive motors.• Stowed drive speed• High torque drive speed• Raised drive speed• Platform lift speed• Platform lower speed• Steer speed• Platform settling speedFor further information or assistance, consult GenieProduct Support.Tip-over hazard. Do not adjustthe lift and/or drive speed higherthan specified in this procedure.Setting drive speed greater thanspecifications could cause themachine to tip over resulting indeath or serious injury.Tip-over hazard. This proceduremust only be performed by atrained service professional.Attempting this procedurewithout the necessary skillscould result in death or seriousinjury.Note: Select a test area that is firm, level and freeof obstructions.
