Genie Z-30/20N Service Manual

Also see for Z-30/20N: Maintenance manual Maintenance manual Service manual Service and repair manual Service manual

Contents

Genie Z-30/20N Service Manual Manual pdf 33 page image

Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N 3 - 15Section 3 • Scheduled Maintenance ProceduresJune 2011REV B CHECKLIST B PROCEDURESB-8Test the Platform Self-levelingNote: Genie specifications require that thisprocedure be performed every 250 hours orquarterly, whichever comes first.Automatic platform self-leveling throughoutthe full cycle of boom raising and lowering isessential for safe machine operation. Theplatform is maintained level by the platform levelingslave cylinder which is controlled by the platformleveling master cylinder located at the base of theprimary boom. A platform self-leveling failurecreates an unsafe working condition for platformand ground personnel.1 Turn the key switch to ground controls and pullout the red Emergency Stop button to the onposition at both the ground and platformcontrols.2 Lower the boom to the stowed position.3 Adjust the platform to a level position using theplatform leveling toggle switch.4 Raise and lower the primary boom througha full cycle.Result: The platform should remain level atall times to within ±5 degrees.B-9Test the Drive BrakesNote: Genie specifications require that thisprocedure be performed every 250 hours orquarterly, whichever comes first.Proper brake action is essential to safe machineoperation. The drive brake function should operatesmoothly, free of hesitation, jerking and unusualnoise. Hydraulically-released individual wheelbrakes can appear to operate normally when theyare actually not fully operational.Collision hazard. Be sure that themachine is not in free-wheel orpartial free-wheel configuration.Refer to B-5,Confirm the ProperBrake Configuration.1 Select a test area that is firm, level and free ofobstructions.2 Mark a test line on the ground for reference.3 Lower the boom to the stowed position.4 Turn the key switch to platform controls.5 Choose a reference point on the machine; i.e.,contact patch of a tire, as a visual reference foruse when crossing the test line.6 Bring the machine to top drive speed beforereaching the test line. Release the drive joystickwhen your reference point on the machinecrosses the test line.7 Measure the distance between the test line andyour machine reference point. Refer toSection 2,Specifications.Note: The brakes must be able to hold the machineon any slope it is able to climb.