Mechanical tests on hoist ropes are only an aid. Maintenance people should not rely solely on an instrument’s ability to detect broken wires, localized corrosion or other physical damage. Visual inspection is still the best means of determining the condition of the rope. Largo Albert, senior hoisting specialist for Inco Ltd., strongly recommends the European practice, where the ropes are inspected by three people: daily by the designated mechanic, weekly by a qualified, but different, individual, and every six months by a senior inspector. By spreading the inspection, there is less likelihood of a serious rope failure, like the one experienced at the Renabie mine last year. One individual can become accustomed to seeing a rope in poor condition and thus not recognize an imminent failure.
A comprehensive, non-destructive testing program must also be implemented for critical parts of the hoist where heavy wear areas are not visible. It is mandatory that regular tests be performed on drum shafts, pinions, brake system components and conveyance suspension components. Ultrasonic examination, magnetic particle and dye penetrant inspections are employed. *
Be the first to comment on "Maintenance THE EYES HAVE IT"