Link Drive Crown Repair

HZ/USI (SL4-2300)

Cracks in the crown structure were discovered during the annual inspection.  We repaired the cracks and installed additional structural gussets in the stressed areas.

 

Photographic Record:

Disassembly (LF) Disassembly (RF)


RF link pivot pin retainer plate (broken bolt – REPAIRED) D-Links “rolled up” out of the way


Disassembly (RR) Disassembly (RF)


Additional support gussets Additional support gussets – bevel detail


Additional support gussets – radius ground smooth Preparation for repair – component protection with fire blanket


Preparation for repair – component protection with fire blanket Preparation for repair – component protection with fire blanket


Preparation for repair – component protection with fire blanket Preparation for repair – component protection with fire blanket


Preparation for repair – component protection with fire blanket Preparation for repair – component protection with fire blanket


Preparation for repair – component protection with fire blanket Crack removal (torch cut method) 100% dye check


Crack removal (torch cut method) 100% dye check Crack repair – weld fill (dye check)


Crack repair – weld fill Crack removal (torch cut method) 100% dye check


Crack removal (torch cut method) 100% dye check Crack removal (torch cut method)


Crack repair – weld fill Crack repair – weld fill


Crack removal (torch cut method) Crack removal (torch cut method)


Crack removal (torch cut method) Crack removal (torch cut method)


Crack removal (torch cut method) Crack removal (torch cut method)


Crack removal (torch cut method) Crack removal (torch cut method)


Crack removal – very deep crack (LR) Needs more cutting (LR)


Crack gone Crack repair – weld fill (LR)


Crack repair – weld fill (LR) Crack repair – weld fill (LR)


Root pass on gusset Root pass on gusset


Root pass on gusset (100% dye check) Root pass on gusset (100% dye check)


Root pass on gusset (100% dye check) Root pass on gusset (100% dye check)


Gusset welding Gusset welding


Gusset welding (ground smooth) Gusset welding (ground smooth)


Smooth radius on top side Smooth radius on bottom side


Crown wall repair (LR) ground smooth Gusset welds ground smooth


Gusset welds ground smooth Crown wall repair (LF) ground smooth


Final product (gussets ground, radiuses ground, and painted – ready for cleaning and assembly) Final product (gussets ground, radiuses ground, and painted – ready for cleaning and assembly)


Re-aligning the pivot pin blocks Re-aligning the pivot pin blocks


Re-assembly (LR) Re-assembly (LF)


After final cleaning, just prior to cover installation After final cleaning, just prior to cover installation