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Liebherr CBW 60t crane luffing cylinder installation
 

The vessel just had finished a dry-docking in China. Among others, an overhaul of the massive luffing cylinders of the Liebherr CBW 60 cranes was carried out by the Yard. Due to an assembly fault by the Chinese repairer, the piston got stuck and damaged one luffing cylinder. It could not be repaired and the vessel had to sail without luffing cylinders on crane 1.

The damaged cylinder was air freighted to ALATAS Singapore for urgent repairs. ALATAS Singapore, working on a 24/7 basis dismantled the cylinder, procured materials and machined and installed a new piston assembly.

The repaired cylinder then was delivered  to the arriving vessel at Singapore anchorage just in time. Cylinder installation was carried out by ALATAS Engineers, utilizing a floating crane and staging.

 

Liebherr CBW 60t crane luffing cylinder installation gallery:

   
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Vessel with Liebherr CBW crane
Cylinder removal from Liebherr crane
Cylinder removal from Liebherr crane
     
     
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Cylinder repairs
Cylinder before disassembly
Screw removal
     
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Cylinder rod removal
Cylinder rod removal
Cylinder rod removal
     
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Hydraulic cylinder pulled out
Missing wear rings
Rod surface with scratch marks
     
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Cylinder barrel with scratch marks
Piston jammed and unable to be loosened
Piston after cutting off from the rod
     
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New piston fabrication as per sample
Jammed piston thread stud
removed and thread reworked
Cylinder repairs
     
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Cylinder repairs
Cylinder repairs
Cylinder repairs
     
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Cylinder repairs
Cylinder testing
Cylinder testing
     
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Replacing port side safety valve
Lifting cylinder with floating crane
Installation of pin to top cylinder
     
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Installation of boom cylinder pin
Installation of bottom cylinder bearing
Installation of lower bush
     
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Installation of staging on crane 1
Installation of cylinders with floating crane
Installation of hydraulic hoses


Liebherr CBW crane function test

 
 
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