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Liebherr crane refurbishment
 

Refurbishing project of 5 units Liebherr Deck Cranes type D2xSB 20 successfully concluded.

The vessel is equipped with 2 twin cranes 2 x 20t and a single crane 20t, build in 1979. The steel structure showed severe corrosion, rendering the cranes unfit for use. Four new crane booms were needed. Liebherr quoted a delivery time of 10-12 months and a very high price, both of which was unacceptable to the owners. Furthermore, the Chinese ship yard, where the vessel was docking at the time was unable to repair or rebuild the booms.

ALATAS Singapore was called to the rescue and contracted to manufacture 4 new booms, repair the 5th and carry out a full overhaul of all rope winches, slewing gears, hydraulic pumps and motors, hook blocks as well as re-manufacturing two twin hook traverse. Upon commissioning, the crane’s entire electrical and electronic control system was re-wired, calibrated and tested for automatic twin crane operation. This was carried out at anchorage, using floating crane assistance. Making the commissioning work more difficult, was a full deck load of construction machinery, that could not be disturbed...

ALATAS vast resources and technical expertise were put to good use to successfully conclude this complex task, on time and within budget.

Liebherr crane refurbishment gallery:

     
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Vessel
4 pcs boom 20t - 22m, crane 1-4,
cannot be repaired,
but need to be manufactured new
Boom head totally wasted
on all 4 booms
Corroded boom head
     
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Control panel in need of full overhaul
repairs in machinery room
Worn & brittle hydraulic hoses
Damaged pump distributor gearbox
     
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Hydraulic aggregate prior overhaul
Rebuilding hydraulic
aggregate in progress
Electrical wiring in need
of replacement
Old, defective control
cables before renewal
     
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Overhaul of slewing gearbox
Boring
Boom
Boom
     
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Winch frames wasted
and previously repaired
Boom manufacturing
fitting of winches.
Jib head
In-situ boring of winch frame
     
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Boom
Boom
Pressure Memory Switches
& Brake Solenoids
Booms after painting
     
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All Hoses connected on
Hydraulic Motors
Boom on Barge
Floating Crane
Crane slewing platform
without boom
     
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Boom assembly at anchorage
Twin crane 2&3, without boom
All Cranes Column water blasted
No.3 Crane LHS Pivot Pin removal
     
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Boom Lifting
Vessel with booms removed
Vessel with booms removed
No.3,4,5 crane Boom arriving
     
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Hydraulic pumps and hoses
Boom rigging
No.5 Crane wire Rope reeving
No.3 Boom on Hatch.3
     
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No.5 Boom to the Crane
No.4 Boom Hand Rail fixing
No.3 to Lift & Fixing
No.5 crane Luff pump removal
     
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No.3&4 Boom Rest Modification
No.4 boom platform fixing
No.5 Boom in place
No.5 Crane Start Operating Test
     
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No.2 Crane Load Test
No.4 Crane Load Test
   
   
 
 
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