4 - 22 S-60 • S-65 Part No. 77828July 2005Section 4 • Repair ProceduresREV BBOOM COMPONENTS21 Attach a lifting strap from a 5 ton / 5000 kgoverhead crane to lug at the rod end of theboom extension cylinder.22 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 boom if not properlysupported.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 boom.During removal of the extensioncylinder, the overhead crane strapwill need to be carefully adjustedfor proper balancing.4-5Boom Extend/Retract CablesHow to Adjust the Boom Extend/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.Perform this procedure with theboom in a horizontal position.This procedure will require twopeople.1 Fully extend the boom.2 Retract the boom approximately12 inches / 30 cm.3 Remove the boom cover at the pivot end of theboom.
