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. |
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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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