Service and Repair Manual September 2016Ground Controls56 GS-84 • GS-90 Part No. 1272222How to Adj ust the Pl atform Low er SpeedHow to Adjust the Platform LowerSpeed1 Pull out the red Emergency Stop button to theon position at the platform controls.2 Push in the red Emergency Stop button to theoff position at the ground controls.3 Turn the key switch to ground control.4 Press and hold both the blue platform up andyellow platform down buttons. Pull out the redEmergency Stop button to the on position atthe ground controls.Result: TUNE SPEEDS is showing in thediagnostic display window. The ECM is now inprogramming mode.5 Press the lift function enable button.6 Use the yellow platform down arrow to scroll todescent speed.Result: MAX DESCENT SPEED is showing inthe diagnostic display window.1 diagnostic display2 blue platform up button3 lift function enable button4 yellow platform down button7 Press the lift function enable button.8 Press the yellow platform down button todecrease the platform descent speed or pressthe blue platform up button to increase theplatform descent speed. Refer toSpecifications, Performance Specifications.Note: The performance achieved should always bewithin specifications.9 Press the lift function enable button.10 Push in the red Emergency Stop button to theoff position at the ground controls.11 Check the lower speed of the machine. Referto Specifications, Performance Specifications.
