Oshkosh Corporation JERR-DAN 20NGADF6T-LP, Руководство по эксплуатации и безопасности

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Section 6 - Maintenance
5376000207 6-5
6.4 WIRE ROPE HANDLING AND INSPECTION
Wire Rope WILL FAIL if worn-out, overloaded, misused, damaged, improperly
maintained or abused.
Wire rope failure may cause serious injury or death!
Protect yourself and others:
• NEVER USE wire rope that is WORN-OUT, DAMAGED or ABUSED.
• NEVER OVERLOAD a wire rope.
• REFER TO APPLICABLE CODES, STANDARDS and REGULATIONS
for INSPECTION REQUIREMENTS and REMOVAL CRITERIA.
A new wire rope requires a break in period. Run the wire rope through several cycles
at low speeds gradually increasing the load on the wire rope. Drag another truck,
forklift or other heavy object to induce a load on the wire rope. Make sure that the
wraps of the wire rope are tight and evenly wound on the winch drum. A loose wire
rope on the winch drum will cause crushing of the wire rope when heavy loads are
applied.
All wire rope in continuous service should be observed during normal operation and
visually inspected on a weekly basis. A complete and thorough inspection of all ropes
in use must be made at least once a month and all rope which has been idle for a
period of a month or more should be given a thorough inspection before it is put
back into service. All inspections should be the responsibility of and performed by an
appointed competent person with the training and experience to look for deterioration
of the wire rope.
It is good practice, where the equipment is consistently in use, to give the rope a
certain length of service, several hundred hours, several weeks or months and then
renew the rope regardless of its condition. This method reduces the risk of fatigue
causing a rope failure.
Any deterioration, resulting in a suspected loss of original rope strength, the wire
rope should be replaced.
There are certain points along any given rope which should be given more attention
than others, since some areas will be subjected to greater stresses, forces, and
hazards. Some of these areas include at the winch drum, at the boom sheaves and
at the end attachments.
The most common sign of rope deterioration and approaching failure is broken wires.
Inspection criteria are specific as to the number of broken wires allowable under
various circumstances. It is important that a diligent search be made for broken wires,
particularly in critical areas. Inspection of wire rope ends should include hooks and
thimbles.