BI005074
CHAPTER 1 MECHANICAL MAINTENANCE SECTION 4 - FRONT END EQUIPMENT The front end equipment of the 1260W walking dragline (figure (6) consists of the boom, boom deflecting sheaves, and boom point sheaves; mast; house deflecting rollers; fairlead and fairlead buffer cylinder; running ropes - hoist and drag; suspension ropes - upper, lower and intermediate and intermediate rope take-up mechanism; Aframe; bucket and bucket rigging.
BOOM The boom (figure (6) should be inspected daily. In the area of the boom feet check for a sound connection between the boom and the revolving frame.
1. 2. 3. 4. 5. 6.
BOOM LOWER TOWER UPPER TOWER POINT SHEAVES MAST DEFLECTION ROLLERS
7. 8. 9. 10. 11.
Check for cracking in all plate to plate and plate to chord weld joints. Examine reinforcing gussets which run along side the chord ends. Check the fabricated plate structure ofthe boom feet for plate fracture. If cracks are found repair weld as outlined in Appendix and Tubular Boom Manual. Lubricate all manual lube points and check that all points lubed by the automatic system are receiving the proper amount of grease. All boom chord members should be visually inspected especially in the area of weld joints and peripheral surfaces of the chords.
A-FRAME FAIRLEAD UPPER STRUCTURAL STRAND LOWER STRUCTURAL STRAND SAFETY STRUCTURAL STRAND
13. 14. 15. 16. 17.
LOWER INT. STRUCTURAL STRAND HOIST ROPE DRAG ROPE BUCKET AND RIGGING DIAPHREAGM
12. UPPER INT. STRUCTURAL STRAND
FRONT END EQUIPMENT FIGURE 66
BUCYRUS-ERIE COMPANY. 1985
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