4 - 26 Genie Z-45/22 Part No. 32960Service Manual - Second EditionSection 4 - Scheduled Maintenance ProceduresC-1Check the Primary BoomWear PadsMaintaining the primary boom wear pads in goodcondition is essential to safe machine operation.Wear pads are placed on boom surfaces to providea low friction, replaceable wear pad betweenmoving parts. Improperly shimmed wear pads orcontinued use of worn out wear pads may result incomponent damage and unsafe operatingconditions.1 Start the engine from the ground controls andraise the end of the primary boom to acomfortable working height (chest high).2 Extend the extension boom 10 inches (25 cm).3 Measure each wear pad. Replace the pad if it isless than 0.41 inches (1 cm) thick. If the pad ismore than 0.41 inches (1 cm) thick, shim asnecessary to obtain zero clearance and zerodrag.4 Extend and retract through the entire range ofmotion to check for tight spots that could causebinding ro scraping.Always maintain squarenessbetween the primary boom outerand inner tubes.C-2Check the Turntable RotationBearing BoltsMaintaining proper torque on the turntable bearingbolts is essential to safe machine operation.Improper bolt torque could result in an unsafeoperating condition and component damage.1 Raise the secondary boom and place a 4x4x31inch (78 cm) block between the chassiscounterweight and the upper mid-pivot. Carefullylower the secondary boom onto the block.bTable C Proceduresaca upper mid-pivotb 4x4x31 inch blockc counterweightCrushing hazard. Keep handsaway from the block and allmoving parts when lowering thesecondary boom.2 Raise the primary boom until the end of theboom is approximately 7 feet (2 m) off theground.3 Be sure that each turntable bolt is torqued insequence to 190 foot-pounds (258 Newtonmeters).Bolt torque sequence4 Remove the support block and then lower theprimary and secondary booms to the stowedposition.5 Use a forklift to support the chassiscounterweight, directly below the turntablebearing.161371012131422184195152322181117246 20 9800-610-4101ActionRental.com
