Richard, a recent safety webinar attendee, asks:
“Do you need to load test when you replace the wire rope in an underhung hoist?”
Peter Cooke, CMCO Training Manager and Safety Webinar presenter, answers:
The replacement of wire rope or chain for underhung hoists is specifically excluded from load test requirements. The wire rope should have already been tested by the manufacturer during the production process. The technician should perform a test without a load to check lifting and lowering function, brake operation and to check limiting devices. Reference ASME B30.16 for further details.
Some wire rope manufacturers recommend breaking in the rope. After installing the rope and starting with a light load (based on manufacturer’s recommendations), run through 20-25 lifting and lowering cycles at a reduced speed, gradually increasing the weight up to full capacity, if possible. This will allow the rope to adjust and properly seat itself. After this break-in procedure, secure the hook block and disconnect the rope end to relax or correct any possible torque or twists developed during the new installation and break in.
Want to learn more about Wire Rope Inspection and Maintenance of Underhung Hoists? Check out our recent safety webinar for yourself: