wire ropes will eventually deteriorate to a point where they are not safe and will require replacement. Wire rope should be thoroughly inspected at regular monthly intervals by an authorized person and a determination made when further use of the rope would constitute a safety hazard. Each inspection should include a written dated and signed report of rope condition. Reports should be filed and reviewed each month and any rope deterioration carefully noted. Inspections revealing but not limited to the following conditions should cause inspector to question remaining strength of rope and consider replacement:
(1)Twelve randomly distributed broken wires in one rope lay or four broken wires in one strand. (See Figure
Figure 5-4. Description of One Rope Lay.
(2)Wear of one-third of the original diameter of outside individual wires.
(3)Kinking, crushing, or birdcaging.
(4)Heat damage from any cause.
(5)Reductions from nominal diameter of more than 1/32” for 7/16” diameter rope or 3/64” for 9/16” rope. See Figure 5-5 for proper measurement techniques.
Figure 5-5. Correct Method of Measuring Rope.
(6)Rope corrosion, internal or external.
(7)Effects from improper lubrication.
(8)Rope being idle for one month or more due to shutdown or inactivity.
Special attention should be exercised when inspecting rope normally hidden during inspecting procedures.
Please refer to the Wire Rope Users Manual
WRTB Fulfillment
609 North Second Street
St. Joseph, MO 64502
Or by calling: 1-888-BUY-WRTB (289-9782).
b)Maintenance. Keep rope well lubricated to help reduce internal friction and prevent corrosion. Lubricant, as described in Paragraph 4-3, should be applied as a part of the regular maintenance program. Special attention is required to lubricate sections of rope over equalizing sheaves and other hidden areas.
Avoid dragging ropes in dirt or around sharp objects that will scrape, nick, crush, or induce sharp bends in the rope.
WARNING
Use only factory-approved rope with swaged wire rope socket.
c)Replacement. When recommended by an authorized inspector, the rope should be replaced. Replacement rope assemblies are shipped from the factory carefully coiled to prevent damage by kinking. Care must be taken to avoid twisting or kinking when uncoiling and handling during reeving.
Before replacing rope, check condition of grooves in sheaves and drums to determine if they are excessively worn.
When first using hoist after rope replacement, break in rope by operating under lighter loads to full travel before applying maximum load.
5-7.ROPE REEVING.
a)General. Place reel on stand with shaft through the center of reel so rope can be pulled straight out with reel rotating.
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