Simultaneous Stern Tube Seal and Propeller Repair on Vessel

Press Release
Wednesday, April 20, 2011

Last week a Hydrex diver/technician team replaced three seals on a 180-meter tanker berthed in New York while concurrently cropping two of its propeller blades to restore balance to the propeller.
 
The team mobilized from the Hydrex office in Tampa together with all the equipment they needed for the operation. In New York an Aegir Marine specialist joined the team at the ship’s location and the team made all necessary preparations to begin the repair. Both operations were carried out at the same time while the ship was trimmed and at some 60 meters from the quayside.
 
The stern tube seals needed  attention because water was leaking into the monitoring tank. To gain access to them, part of the team built a scaffolding around the assembly. They could then remove the rope guard and carry out an inspection of the entire assembly. This revealed that the two water seals and the oil seal were completely worn, causing the leak, and needed replacing. The diver/technicians then removed the stern tube seals one by one and replaced them with new ones. These were prepared by the Aegir Marine specialist before they were positioned and bonded.
 
At the same time the rest of the team repaired the propeller. They used a pontoon with the cropping equipment on it to reach the blades. One of blades had been severely bent and had suffered several cracks, which ruled out any possibility of straightening it. The team made an exact assessment of the damage and used these measurements to find the best cutting line. They then cut the damaged blade after which they cut the opposite blade at exactly the same place. This was done to make sure that the propeller would be balanced again and to bring its performance back as close to optimum as could be achieved.
 
Besides carrying out both parts of the operation simultaneously, the team also worked in shifts around the clock to limit the off hire time of the vessel. This allowed the superintendent to sail his vessel again with both its propeller and stern tube seals back intact with only a minimal delay.
 

Source: Hydrex

Maritime Reporter April 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Incat Crowther Designs Commercial Security Vessel

Incat Crowther has received a contract to design an offshore commercial oilfield security vessel for Veecraft Marine and its client, UTM Dredging Ltd, the designer announced today.

SCHOTTEL to Present Inland Offerings

SCHOTTEL will present its expertise to the U.S. inland market at the upcoming Inland Marine Expo in St Louis, June 15-17, 2015: strong push boats in Brazil, big

MHI to Shift Operations from Yokohama Kanazawa

Mitsubishi Heavy Industries, Ltd. (MHI) and Mitsubishi Hitachi Power Systems, Ltd. (MHPS) have decided on a policy to transfer operations currently performed

Vessels

5th Floating Accommodation for Lerwick

A further accommodation ship, Ocean Atlantic, is due at Lerwick on Monday 27 April 2015 and is on its way from Portland in Dorset. As with the other floating accommodation at the port,

IMO Calls for Environmentally Sound Ship Recycling in Bangladesh

The  International Maritime Organization (IMO) and the government of the People’s Republic of Bangladesh are jointly implementing a project entitled “Safe and

Zim Offers Asia-US east coast service via Suez

Israeli liner carrier Zim Integrated Shipping Services is launching a new service between Asia and the U.S. East Coast via the Suez Canal at the end of May.   The

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Naval Architecture Navigation Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1560 sec (6 req/sec)