have gloves, hardhats, safety glasses or goggles, andsafety shoes for all hands, sledge hammers, pliers,crowbars, marlin spikes, extra cotter pins, and dunnage.WARNINGAlways wear gloves when handling wire rope.NOTE: When breaking down a lattice boom, takethe opportunity this provides to inspect itemsthoroughly, such as the connecting pins, cotter keys,and inside the connecting lugs for wear, rust, andsurface cracks.A common method used to break down a pin-connected basic boom and add a section is as follows:1. Set outriggers and swing the upper revolvingunit over the rear or side, depending on the make andmodel of the crane.2. Lower the hook block(s) to the ground andprovide slack in the hoist line(s). Next, lower the boomand set the boom tip sheaves on a piece of dunnage.3. Engage the boom hoist control lever to lower thebridle assembly or boom mast to slacken the pendant lines.4. To prevent the pendant lines from falling on theground, use tie wire or rope to secure the pendant linesto the boom. Then remove the cotter pins and drive outthe main pins from the bridle assembly connections inthe pendant lines.5. Position the bridle assembly on top of the boombutt (fig. 12-26, view A). This is done by having theoperator engage the boom hoist control lever to tightenthe boom hoist lines until the bridle is positioned on topof the boom butt. To align the pinholes, manuallyposition the bridle assembly using the crowbar. Thepins that are used for the pendant line connections areFigure 12-26.-Boom hoist assembly connected to boom butt.12-13
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