hoist control lever to provide slack in the boom hoistlines to align the pendant lines. Once the pendants arealigned, insert the pendant connection pins and cotterpins.5. Next, engage the boom hoist control lever toraise the bridle assembly and pendants. Before doingthis, go back through and visually inspect all boom andpendant line pin connections and cotter pins. Havesomeone visually watch the boom hoist drum to ensurethe wire rope does not cross wind, causing the wire ropeto be crushed or kinked. Additionally, ensure all of theboom hoist wire rope is properly running on all of thesheaves. Once everything checks out, engage the boomhoist control lever and raise the bridle assembly andpendants until they are tight.6. Visually check the boom suspension system beforeraising the boom off the ground As the boom is being raised,visually check the reeving of the boom hoist wire rope.7. Once the boom is erected, check the hoistwire rope reeving. You want to ensure the wire ropeis correctly flowing through the boom tip and hookblock sheaves and winding properly on the hoist drum.Before the crane can be operated, as outlined in theNMCB, Equipment Management, COMSECOND/COMTHIRDNCBINST 11200.1, and before putting thecrane back in service, the crane test director must inspectthe crane for correct installation of all components andverify the prior testing and mechanical condition ofadded components. The crane certifying officer maydirect the crane to be load-tested at its safe load capacityat minimum and maximum radius.TELESCOPIC BOOM CRANESTelescopic boom cranes are typically calledhydraulic cranes. The booms are composed of a seriesof rectangular, trapezoidal, or other shape ofsymmetrically cross-sectional segments, fitting intoeach other. The largest segment, at the bottom of theboom, is called the base section or boom butt. Thesmallest section, at the top of the boom, is called the tipsection or boom tip. In between there can be one ormore sections called the first, second, and so forth,sections. With the boom fully retracted, the telescopicboom crane is highly maneuverable and easy totransport to jobsites.Telescopic boom cranenomenclature is shown in figure 12-27.Figure 12-27.—Telescopic boom crane nomenclature.12-15
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business