Service Manual April 2016Checklist D Procedures36 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N Part No. 139378D-1Check the Boom Wear PadsGenie specifications require that this procedure beperformed every 1000 hours or annually,whichever comes first.Maintaining the boom wear pads in good conditionis essential to safe machine operation. Wear padsare placed on boom tube surfaces to provide a lowfriction, replaceable wear pad between movingparts. Improperly shimmed wear pads or continueduse of extremely worn wear pads may result incomponent damage and unsafe operatingconditions.1 Measure each wear pad. Replace the wearpad once it reaches the minimum allowablethickness. If the wear pad is still withinspecification, shim as necessary to obtainminimum clearance with zero binding.2 Extend and retract the boom through theentire range of motion to check for tight spotsthat may cause binding or scraping of theboom.Note: Always maintain squareness between theouter and inner boom tubes.Models without rotating jib boom:Primary boom wear pad specifications MinimumTop and side wear pads(extension end of boom)5/8 inch15.9 mmBottom wear pads(extension end of boom)5/8 inch15.9 mmBottom and side wear pads(pivot end of boom)5/8 inch15.9 mmTop wear pads(pivot end of boom)3/8 inch9.5 mmModels with rotating jib boom:Primary boom wear pad specifications MinimumAll wear pads 3/8 inch9.5 mm
