Crane Systems | by Columbus McKinnon Training | Mar 13, 2015
“Do you need to load test when you replace the wire rope in an underhung hoist?”
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.
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:
To help ensure the safety of your operator and the integrity of your overhead crane system, it is essential that you keep a well-planned inspection and maintenance program for wire rope hoists. This webinar covers the basics of Wire Rope Construction, Inspection Criteria for Wire Rope, and Proper Lubrication of Wire Rope.
Articles authored by "Columbus McKinnon Training" were written by industry professionals with decades of unique and in-depth experience in the material handling industry who are no longer employed by Columbus McKinnon.