GINDIN: продукция Union Rope в России

PRODUCT BULLETIN WIRE ROPE INSTALLATION ON MOBILE CRANES February 2014 Wire rope is an integral part of the mechanics that are necessary for mobile crane operation and, like any other mechanical part, it performs best when installed correctly. Two factors are key to proper installation no matter what type of equipment, or which wire rope is being used: making sure the rope is free of twist and assuring that the rope is tightly spooled on the drum. Twist-free Installation Normal spooling and handling can induce twist in a rope. If a twist becomes trapped in the rope it can cause spooling problems or a kink resulting in permanent damage and/or operational problems with spooling or block rotation. One method to assure release of trapped twist is to remove the rope from the shipping reel and pull it straight out on the ground. Mount the reel on a shaft supported by two jacks, a roller payoff or unreeling stand. Remove the rope from the spool by grasping the end and, keeping the rope straight, walk it away. This will allow any trapped twist to work itself out as the rope is pulled onto the drum. In areas of limited space it can be necessary to install directly from the shipping reel to the drum. This may result in a twist being trapped in the rope on the crane. Mounting the reel on a shaft supported by two jacks on the ground will allow for a direct transfer. Prevent over-rotation of the reel by applying a brake to the spool flange of the shipping reel while spooling rope onto the crane’s drum. Never apply a brake against the spooled rope itself or pass the rope between a pair of blocks used as a caliper brake. This will damage the rope and may make it unusable. Install the rope on the drum focusing on keeping twist out of the rope and on thread laying the rope on the drum. Before proceeding with reeving, make a final check for twists that may still be trapped in the rope (this is particularly important with direct-from-shipping reel installation). Pull enough rope off the drum to allow it to hang slack from a horizontal position. If the rope wraps together and does not form a smooth “U” shape, there is a twist trapped in the rope. To remove any twist found in a single part line, extend the boom to maximum length and raise it to its highest point. Pay out the rope with only the overhaul ball attached and let it hang, just off the ground, fully extended until the twist works itself out.