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Hoist Winch Gearbox Failure on Tsuji Deck Crane

 

The vessel is a container feeder vessel equipped with Tsuji Deck cranes, type SSCHS4525-T1 with a lifting capacity of SWL 45t at 28m and 40T at 25m radius. Crane 2 developed a hoisting problem and ALATAS Tsuji Crane Specialist went on board to investigate. It was determined that the planetary gearbox had seized, and the gearbox needed to be removed from the crane and sent to Alatas Engineering workshop for strip down and inspection.

The hoisting winch gearbox is a planetary gearbox, make Sumitomo ComPower, type CPHFL-160A-QS-67A, drawing Nr. KHA760G. As it turned the gears were found completely smashed and a new gearbox had to be procured and installed. (download inspection report here)

Alatas mobilized engineers, tools & rigging equipment to remove the damaged rope winch gearbox from the crane and installed the new gearbox. The job to remove the hoisting winch is a large job and needed careful planning, mainly because of the hoisting which is located underneath the luffing winch frame and it is further complicated because of the very limited space inside the crane house. Also, considerations had to be made on how to lift the gearbox down to deck from the high up crane maintenance hatch.

Vessel

Rigging gear

Vessel

Stinger sheave block prior to removal

Jacking counter frame bearing

Narrow space in crane machine house

Jacking counter frame bearing

Narrow space in crane machine house

Working in confined space

Removing hoisting brake unit

Working in confined space

Removing hoisting brake unit

Separating gearbox from rope drum

Separating gearbox from rope drum

Separating gearbox from rope drum

Separating gearbox from rope drum

Remove hoisting wire rope

Removing gearbox out of maintenance hatch

Remove hoisting wire rope

Removing gearbox out of maintenance hatch

Lifting gearbox out of crane

Lifting gearbox out of crane

Lifting gearbox out of crane

Lifting gearbox out of crane

Rigging of hoist winch

Winch drum removed from frame

Rigging of hoist winch

Winch drum removed from frame

Narrow space in crane machine house

Planetary gearbox to be opened for inspection

Rigging of hoist winch

Planetary gearbox to be opened for inspection

Opened planetary gearbox - smashed teeth

Planetary gearbox dismantling in progress

Opened planetary gearbox - smashed teeth

Planetary gearbox dismantling in progress

Planetary gearbox -dismantled parts

Opened planetary gearbox - smashed teeth

Planetary gearbox -dismantled parts

Opened planetary gearbox - smashed teeth

Opened planetary gearbox - smashed teeth

Opened planetary gearbox - smashed teeth

Opened planetary gearbox - smashed teeth

Opened planetary gearbox - smashed teeth

Opened planetary gearbox - smashed teeth

 

Opened planetary gearbox - smashed teeth

 

 
 
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