Genie GR-20J Service Manual

Also see for GR-26J: Operator's manual Installation instructions Operator's manual

Contents

Genie GR-20J Service Manual Manual pdf 54 page image

Section 4 • Repair Procedures4 - 8 GR-20J • GR-26J Part No. 227656September 20162-2Platform Overload SystemHow to Calibrate the PlatformOverload System (if equipped)Calibration of the platform overload system isessential to safe machine operation. Continueduse of an improperly calibrated platform overloadsystem could result in the system failing to sensean overloaded platform. The stability of themachine is compromised and it could tip over.Note: Perform this procedure with the machine ona firm, level surface that is free of obstructions, andthe machine in stowed position.1 Block the wheels at the steer end of themachine.2 Remove all weight, tools and accessories fromthe platform.Note: Failure to remove all weight, tools andaccessories from the platform will result in anincorrect calibration.3 Fully tighten the adjusting screws of both theoverload sensors. Do not over tighten.4 Using a suitable lifting device, place a440 lbs / 200 Kg test weight in the center of theplatform. Secure the weight to the platform.5 Tighten the overload spring adjustmentscrew just until the screw and lock nut willrotate freely, and the clearance between thelock nut and sensor mounting bracket isminimal.a adjusting screwb overload sensor number 1c overload spring adjustment screwd overload sensor number 2e overload sensor mounting bracketf overload springg spacer6 Place an additional 44 lbs / 20 kg test weight inthe center of the platform. Secure the weight tothe platform.7 Turn the key switch to platform control and pullout the red Emergency Stop button to the onposition at both the ground and platformcontrols.Note: Rotate the red Emergency Stop button atplatform control one quarter turn in a clockwisedirection to restore the power supply. The redEmergency Stop button returns automatically tothe out, or on position.a b cdaefgePLATFORM COMPONENTS