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Slew ring bearing change on Liebherr ship crane
 
Liebherr deck crane

A Liebherr deck crane on a bulk carrier of one of Alatas' world wide customers experienced a critical failure of the main slewing bearing ring, rendering the crane out of order and in danger of toppling.

The vessel was fully loaded and on voyage to the discharge port, where the use of the impaired crane was absolutely necessary, as harbour cranes were not available for dockside discharge

Experiencing Alatas expertise in the past the owner diverted the vessel to Singapore and Alatas was entrusted to manage the slew bearing change-out.

Receiving notice only 3 days in advance, Alatas made good use of it's world wide connections and managed to have a replacement slewing bearing ready for the customer in 3 days. Alatas management expertise and the extensive experience of it's professional staff and engineers paid off. Detailed planning and preparations where carried out prior arrival of the vessel. Work force, equipment and a floating crane where at the ready soon after arrival and Alatas managed to have the crane removed, replaced the bearing, re-installed it onto it's pedestal and re-connected the boom in less then 10 hours (!). The floating crane time alongside was kept well below the time limit of 12 hours and very expensive additional barge crane charges where avoided.

Congratulations to everyone involved for a job well done !

 

Removal of slewing ring bolts
Removing boom hinge bolts
Removal of slewing ring bolts
 
Dismantling boom hinge bolts
New slew bearing arrives
 
New slew bearing unpacked
New bearing, still packed
 
Unpacking new bearing
New slewing bearing preparations
 
Crew at work
New slewing bearing being prepared
 
Dimitry Loupos, everything under control
150t floating crane removes crane boom
 
Ship crane lifted from pedestal
Lifting off the boom, using 150t floating crane
 
Lifting the crane slewing column,
using 150t floating crane
Crane slewing base preparation
 
Old slew bearing removal
Preparation of crane base column flange
 
Removal of the old slewing bearing
and setting the crane column onto the new one
New crane slewbearing installed and rope reeving
 
Crane rope reeving
Crane with new slewing bearing, rope reeving
 

Rope reeving

 
 
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