Figure 12-40.-Wedge socket.excessive heat), metallic particles, chips or displacedmetal, broken or distorted bearing retainer or seals,adequate lubrication, and tight bearing caps.Wire Rope End ConnectionsWire rope end connections must be as specified bythe manufacture.The most common type of endconnection used in the NCF is the wedge socket (fig.12-40).Wedge sockets develop only 70 percent of thebreaking strength of the wire rope due to the crushingaction of the wedge. Swage socket, cappel socket, andzinc (spelter) socket wire rope end connections allprovide 100 percent of the breaking strength of the wirerope when properly made.Exercise caution when wedge socket connectionsare used to make rated capacity lifts. Wedge sockets areparticularly subject to wear, faulty component fit, anddamage from frequent change outs, and are highlyvulnerable to inadvertent wedge release anddisassembly in a two-blocking situation.NOTE: Two-blocking is hoisting thesheaves against the boom tip sheaves.hook blockWedge sockets must be installed as specified in thefollowing procedures:1. Cut and remove any section of wire rope used ina socket that was subject to sharp bending and crushingbefore resocketing.2. Install the wedge socket carefully, so the wirerope carrying the load is in direct alignment with the eyeof the socket clevis pin. This ensures the load pull isdirect.3. Place the socket upright and bring the ropearound in a large, easy-to-handle loop. Extend the deadend of the wire rope from the socket for a distance of atleast one rope lay length. Insert the wedge in the socket,permitting the rope to adjust around the wedge.4. As a safety precaution, install a wire rope clip onthe dead end of the wire rope that comes out of the wedgesocket (fig. 12-41). Measure the distance from the baseof the wedge socket to the clamp. This measurement isused as a guide to check if the wire rope is slipping inthe wedge socket.NOTE: Do not attach the wire rope clip to the deadend and live end of the wire rope that comes out of the12-26
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