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Alatas Singapore - Overhaul of Luffing Cylinders on a Appleton Offshore Crane
 

The FSO is stationed in Myanmar Offshore and the Appleton Offshore Crane, type SB480-115 had developed a problem, The boom was slowly creeping down under load, which our Alatas Senior Offshore Crane Engineer diagnosed as leaking piston seals. Our Crane Spare Parts team supplied new seals sets, and Alatas Crane Services made arrangements to overhaul the luffing cylinders on board.

Under the supervision and guidance of our Sr. Engineer, the luffing cylinders were removed from the crane and placed on deck. The cylinder glands were opened with a special tool and the cylinders completely striped down for inspection. As it turned out, the piston seals had disintegrated, which confirmed the original assessment by our engineer.

New cylinder seal sets were fitted, the cylinders were assembled and installed back onto the crane. A function test and overload test was carried out with SWL x 1.25, and the crane again is fully functional and safe to use.

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Erecting Scaffold

Removing Luff Cylinder

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Removing Luff Cylinder

Removing Luff Cylinder

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Removing Luff Cylinder

Removing Luff Cylinder

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Blasting and NDT in Progress

Luffing cylinders brought down on deck, to be overhauled

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Removing Cylinder Gland with special tool

Scratches on Piston (RHS)

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Scratches in Barrel

Seals Damage (LSH)

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Seals Damage (LSH)

Install back cylinder

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Install back cylinder

Install back cylinder

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Function Test

Load test

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

Overhaul of Luffing Cylinders on a Appleton Offshore Crane

HMI display during Load test

Load test

 
 
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