Service Manual April 2016Checklist B Procedures28 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N Part No. 139378B-8Test the Drive BrakesGenie specifications require that this procedure beperformed every 250 hours or quarterly, whichevercomes 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 maintenance procedure,Confirm the Proper BrakeConfiguration.Note: Select a test area that is firm, level and freeof obstructions.1 Mark a test line on the ground for reference.2 Lower the boom to the stowed position.3 Turn the key switch to platform controls.4 Choose a point on the machine (i.e., contactpatch of a tire) as a visual reference for usewhen crossing the test line.5 Bring the machine to top drive speed beforereaching the test line. Release the drivejoystick when your reference point on themachine crosses the test line.6 Measure the distance between the test lineand your machine reference point. Refer toSpecifications, Performance Specifications.Note: The brakes must be able to hold the machineon any slope it is able to climb.B-9Test the Drive Speed – StowedPositionGenie specifications require that this procedure beperformed every 250 hours or quarterly, whichevercomes first.Proper drive function is essential to safe machineoperation. The drive function should respondquickly and smoothly to operator control. Driveperformance should also be free of hesitation,jerking and unusual noise over the entireproportionally controlled speed range.Note: Selecta test area that is firm, level and free ofobstructions.1 Create start and finish lines by marking twolines on the ground 40 feet / 12.2 m apart.2 Turn the key switch to platform control and pullout the red Emergency Stop button to the onposition at both the ground and platformcontrols.3 Lower the boom to the stowed position.4 Choose a point on the machine (i.e., contactpatch of a tire) as a visual reference for usewhen crossing the start and finish lines.5 Bring the machine to top drive speed beforereaching the start line. Begin timing when yourreference point on the machine crosses thestart line.6 Continue at full speed and note the time whenthe machine reference point crosses the finishline. Refer to Specifications, PerformanceSpecifications.
