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Slew Bearing Replacement with Minimum Downtime on MacGreor Hagglunds Gl2524-2

ALATAS Middle East was requested to undertake a slew bearing change out with minimum down time. The Alatas workforce was mobilized once the vessel was secured in the port to carry out the job site assessment and the panning of the heavy lift.

The job scope included the following:
• Mobilization of personnel
• Mobilization of one 200t and one 400t mobile crane.
• Removal of slew gear boxes.
• Disconnection of electric slip ring unit.
• Hookup of the heavy lift cranes.
• Removal of slew bearing bolts.
• Separation of the crane from its foundation.
• Resting of the crane on the quay side.
• Cleaning of slew bearing flange.
• Flatness check of slew bearing flange.
• Installation of crane and associated components.
• Commissioning, testing and handing over to operation.

 
Vessel with MacGregor Hagglunds GL2524-2 cranes
Scaffolding erection
2nd crane hooked up on crane house
Rusty slew bearing ships spare
       
Rusty slew bearing ships spare
Cleaning of slew bearing
Slew bearing after cleaning
Greasing of slew bearing prior installation
       
Old outer slew bearing bolts
Old outer slew bearing bolts
Slew gearbox
Slew gearbox removed
       
Shore crane connected on boom
Shore crane connected to revolving structure
Both shore cranes connected
Both shore cranes connected
       
Removal remaining outer slew bolts
Lifting of ships crane
Lifting of ships crane
Lifting of ships crane
       
Lifting of ships crane
Lifting of ships crane
Lifting of ships crane
Lifting of ships crane
       
Lifting of ships crane
Landed ships crane on woods @ jetty
Pedestal flange flatness check
Pedestal flange flatness check
       
Fixing inner slew bolts
Fixing inner slew bolts
Fixing inner slew bolts
Fixing inner slew bolts
       
Slew bearing & bolts fixed hand tight
Lifting back ships crane
Lifting back ships crane
Hydraulic tensioning tool
       
Tightening inner slew bolts by Hyd. tool
Slew gearbox connected
Crane function test
Slew bearing clearance check
       
Slew gear backlash check
Slew gear backlash check
Load Testing
Load testing

 

 
 
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