Hoist and Drag Ropes

12 15

16

1 /"----1

7 2

20

1. SUPPORT PLATE 2. SPECIAL NUT 3. SPACER. 4. SPACER 5. SPACER 6. SPECIAL SPACER 7. ROD BOLT 8. JAM NUT 9. FULL NUT 10. WASHER 11. HYDRAULIC RAM 12. HYDRAULIC PUMP 13. PRESSURE GAUGE 14. TEE 15. NIPPLE 16. HOSE 17. PIPE BUSHING 18. PIPE COUPLING 19. SPHERICAL END NUT 20. CONICAL WASHER 21. STRUCTURAL STRAND

STRAND TAKE-UP DEVICE

FIGURE 72

19. After the initial preloadingofthe intermediate structural strands, raise the mast and boom beyond the working angle so the lower main structural strands can be attached to the

A-frame. 20. Using a crane, pick up the loose end of each lower main structural strand, one at a time, and raise it into position on the A-frame. Pin each strand to the links on the A-frame. Make sure the strands are not twisted. A painted line on the strand is provided for this purpose. 21. When all the main lower structural strands have been pinned to the A-frame links, slowly lower the mast and boom until the mast and boom are supported completely by the structural strands. 22. Recheck the preload on the intermediate structural strands and readjust ifnecessary, as outlined in step 18. Remove the take-up material and replace the top socket nuts and lock them in place. 23. Remove the boom hoist rope from the reeving points and drag drum and store the rope for future use.

24. Reattach the drag rope to the drum. Be sure to use the drag rope clamps and not the boom hoist rope clamps.

HOIST AND DRAG ROPES

The hoist and drag ropes should be visually inspected daily. A thorough inspection of the ropes should be made weekly and dated records should be kept as to the condition ofeach rope. Any deterioration which results in appreciable loss of original rope strength should be closely observed and a determination made as to whether further use of the rope constitutes a safety hazard. Conditions such as those listed below should be sufficient reason for questioning rope safety and/or cause for rope replacement.

1. Six randomly distributed broken wires in one rope lay, or three broken in one strand in one rope lay. (A rope lay is the length along the rope in which one strand makes a complete revolution around the rope.)

2. Abrasion, scrubbing or peening which causes the loss ofmore than 1/3 ofthe original diameter of the outside wires.

3. Evidence of severe corrosion.

4. Severe kinking, crushing, or other damage which results in distortion ofthe rope structure.

6. Evidence of heat damage from any cause.