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Wire Rope Hoist Maintenance

Wire Rope Maintenance: Essential to Crane Safety

Clescrane technicians are specially trained in assessing wire hoisting ropes. This includes checking for signs of wear, knowing where failure is most likely and being knowledgeable in the following standards regarding hoisting ropes.

Wire Rope Hoists

1. In using hoisting ropes, the crane manufacturer's recommendation shall be followed. The rated load divided by the number of parts of rope shall not exceed 20 percent of the nominal breaking strength of the rope.

2. Socketing shall be done in the manner specified by the manufacturer of the assembly.

3. Rope shall be secured to the drum as follows:

No less than two wraps of rope shall remain on the drum when the hook is in its extreme low position.

Rope end shall be anchored by a clamp securely attached to the drum, or by a socket arrangement approved by the crane or rope manufacturer. Eye splices.

1. Rope clips attached with U-bolts shall have the U-bolts on the dead or short end of the rope. Spacing and number of all types of clips shall be in accordance with the clip manufacturer's recommendations. Clips shall be drop-forged steel in all sizes manufactured commercially. When a newly installed rope has been in operation for an hour, all nuts on the clip bolts shall be retightened.

2. Swaged or compressed fittings shall be applied as recommended by the rope or crane manufacturer.

3. Wherever exposed to temperatures, at which fiber cores would be damaged, rope having an independent wire rope or wire-strand core, or other temperature-damage resistant core shall be used.

4. Replacement rope shall be the same size, grade, and construction as the original rope furnished by the crane manufacturer, unless otherwise recommended by a wire rope manufacturer due to actual working condition requirements.

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