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O&K special twin crane slew bearing replacement
 

O&K special twin crane slewing bearing replacement

The customer was operating an O&K FGH 2x25t-30m twin crane. The crane had been out of order for a long time.. The problems included worn out hydraulic components and a malfunctioning twin crane control system, however the main problem was a collapsed slewing bearing ring.

The design of this slewing ring is very special. As a result the purchase price is very high and delivery time is more than a year. The owners therefore were considering scrapping the crane.

This is where ALATAS came into play. Through our extensive connections in the maritime industry, we managed to source and deliver a replacement slewing bearing at half the cost and with a delivery time of less than a month.

ALATAS Singapore installed this double function bearing at the shipyard in Singapore using a floating crane. Additionally, an extensive overhaul of the hydraulic components was carried out (A6VM hoist motors, A4V125 hoist pump etc..), the electronic control system (Eberle PLC) was repaired and re-calibrated, and the automatic twin crane control system was re-activated. The crane then was successfully load tested in single crane and twin crane mode.

It shows once more that ALATAS, as an independent crane service organisation is able to solve a customer problem better and faster then the original crane manufacturer would have been able to.

 

O&K special twin crane slew bearing replacement gallery:

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Wire rope removal

Shipyard staging

Crane boom removed
     
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Crane boom removed

Crane column removed

Crane column and platform removed
     
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Crane column and platform removed
Crane column and platform removed
Crane slewring installation
     
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Crane column installation

Boom installation

Slew bolt tightening
     
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Crane function test

Hydraulic adjustments

Overload test
     
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A4V pump to be overhauled

Hoisting motor A6VM and lamella brakes to be overhauled

Operator control desk to be overhauled
     
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Troubleshooting and calibration of
EBERLIE PLC control system
   
   
 
 
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