Service Manual February 2017Boom Components102 S-80 • S-85 • S-80X Part No. 1259369GT22 Lift the boom extension cylinder with the craneuntil it clears the cylinder saddle inside thenumber 2 boom tube.23 Carefully support and slide the extensioncylinder out of the boom.Crushing hazard. The extensioncylinder could fall when removedfrom the extension boom if notproperly supported.Component damage hazard. Becareful not to damage the cablebreak limit switch.Component damage hazard. Becareful not to damage thecounterbalance valves on theprimary boom extension cylinderwhen removing the cylinder fromthe primary boom.Note: During removal of the extension cylinder, theoverhead crane strap will need to be carefullyadjusted for proper balancing.4-5Boom Extend/Retract CablesHow to Adj ust the Ex tend/R etrac t C abl esHow to Adjust the BoomExtend/Retract CablesThe boom extend/retract cables are responsible forthe extension and retraction of the number 3 boomtube. Proper adjustment of the boom extend/retractcables and related components on a regular basisis essential to good machine performance and safemachine operation. The boom extend and retractfunctions should operate smoothly and be free ofhesitation, jerking and unusual noise.Note: Perform this procedure with the boom in ahorizontal position.1 Start the engine from the ground controls.2 Raise the boom to a horizontal position3 Fully retract the boom.4 Stop the engine.5 Remove the boom end cover retainingfasteners and remove the cover.6 Inspect the threaded ends of the boom extendcables. The threads must be clean and ingood condition with no damaged threads.7 Locate the retract cable adjustment nut on thebottom of the number 1 boom tube at theplatform end of the boom. Loosen the nut, butdo not remove the nut.
