3 - 48 S-80 • S-85 • S-80X Part No. 122985Section 3 • Scheduled Maintenance Procedures February 2012Checklist D ProceduresD-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.Note: If the wear pads are still within specification,refer to Repair Procedure 4-2,How to Shim theBoom.1 Start the engine from the ground controls.2 Raise the end of the boom to a comfortableworking height (chest high), then extend theboom 1 foot / 30 cm.3 Measure each wear pad. Replace the wear padif it is less than specification. If the wear pad isstill within specification, shim as necessary toobtain zero clearance and zero drag.a boom 1b boom 2c boom 3b ca4 Extend and retract the boom through the entirerange of motion to check for tight spots thatmay cause binding or scraping of the boom.Note: Always maintain squareness between theouter and inner boom tubes.Boom wear pad specifications MinimumBoom number oneBottom wear pads 1 / 2 inch(extension end of boom) 12.7 mmTop and side wear pads 5 / 8 inch(extension end of boom) 15.9 mmBoom number twoTop, bottom and side wear pads 1 / 2 inch(extension end of boom) 12.7 mmBottom wear pads 1 / 2 inch(pivot end of boom) 12.7 mmTop and side wear pads 5 / 8 inch(pivot end of boom) 15.9 mmBoom number threeTop, bottom and side wear pads 1 / 2 inch(pivot end of boom) 12.7 mm
