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ALATAS complete the 5 year special on RL 1500-20D

Alatas have recently completed the five year special on time, within budget to an excellent standard. SOW included winch inspections, hook block overhaul with pull test, electrical inspection, slew bearing assessment, splines, leak oil and load test to mention a few!

The Liebherr Offshore Crane, type RL 1500-20D, mounted on an Offshore Rig in the North Sea was due for its 5 yearly class survey and thorough crane inspection & maintenance. ALATAS, as the Liebherr Offshore Crane Service Specialist was asked to carry out this field service attendance. Our factory trained, multi-disciplined crane engineers and LOLER and LEEA accredited lifting gear inspectors carried out the crane assessment and maintenance work, which included the following:

- Review of crane certification & maintenance records.
- Inspection of steel structure & loose gears etc. according to our comprehensive offshore crane checklist.
- Inspection and function testing of all main drive components.
- Checking and adjustment of all electric and electronic settings.
- Checking and adjustment all hydraulic settings.
- Measuring the leak-oil amount of all axial piston pumps and motors in order to determine their internal grade of wear
- Taking hydraulic oil samples for laboratory analysis and oil condition monitoring.
- Measuring the axial clearance of main slewing bearing ring, incl. taking grease samples for ferrography analysis.
- Full crane function testing and crane overload testing.
- Carry out miscellaneous crane repairs and crane troubleshooting as necessary.


ALATAS will establish a comprehensive 5 -yearly crane survey reporting package with a summary picture report and class approval documents, stating :

- general condition of the crane
- defects found
- recommendations of outstanding items to follow-up
- Completed check list
- General observations / recommendations
- Offer of parts / labour to clear open items
- Oil & grease sample analysis report

A big thanks to the professional engineers involved for executing the project so well.

 

 
Input drive brake inspection
Man riding brake inspection
Manin brake inspection and overhaul
Manin brake inspection and overhaul
       
Manin brake inspection and overhaul
Manin brake inspection and overhaul
Removal of sheave for pin and sheave NDT
Alatas crane Engineers
       
Load cell inspection checked for wear and electrical signal
Load cell inspection checked for wear and electrical signal
Foundation NDT
10% mandatory slew bolt removal for NDT
       
Alatas Crane Engineers
Electrical inspection of slip ring
Liebherr crane
Liebherr crane
       
       
Pin clevis NDT inspection
Pin clevis NDT inspection
Pin clevis NDT inspection
Mandator
       
Foundation NDT
Foundation NDT
100% weld inspection and UT of boom
Foundation NDT
       
10% mandatory slew bolt removal for NDT
Preparation of winch for spline inspection
Liebherr crane
Removal of sheave for pin and sheave NDT
       
Removal of sheave for pin and sheave NDT
Removal of sheave for pin and sheave NDT
Removal of sheave for pin and sheave NDT
Removal of sheave for pin and sheave NDT
       
Removal of sheave for pin and sheave NDT
Load Test
Commissioning 110% load test
Commissioning 110% load test
       

 

 
 
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WORCS DY11 7RA UK
Tel: +44 1562 747050
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Norway

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Fax: +47 TBC
C/O: Houston Office, 22015, South Frwy.
Manvel, Texas 77578 USA
Tel: +1 281 431 0707
Fax: +1 281 431 0799
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The Synergy, Singapore 609917
Tel: +65 6861 2336
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