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 October 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Sea Star Line: Equipment Replacement Plan on Track

Company Receives New Refrigerated Containers and Places Order for New Genset Equipment   Sea Star Line, LLC began receiving the first of its new 100 40’ and 45’

MacGregor's Hatlapa Brand is 95 Today

November 2014 marks the 95th anniversary of MacGregor's Hatlapa brand. Since its foundation in 1919 by German engineer Max Hatlapa, the formerly independent Uetersen-based

Pair of ASD Tugboats Delivered to Keppel-Smit

The ASD tugs KST Passion and KST Pride were were delivered to their owner, Keppel-Smit Towage Pte. Ltd of Singapore in October 2014. The two vessels are the first

Vessels

HMAS Success Deploys to Middle East

After months of preparation, HMAS Success departed Garden Island in Sydney today for a six-month deployment to the Middle East Region to provide logistic support

Rosneft Ships First Oil From Chayvo Field

Rosneft commenced shipment of crude oil extracted at the Northern Tip of Chayvo license off the coast of Sakhalin, with the first tanker carrying Sokol-grade crude leaving port on November 21.

USS Oscar Austin Deploys to 6th fleet

Arleigh Burke-class guided-missile destroyer USS Oscar Austin (DDG 79) departed Naval Station Norfolk Nov. 21 for a deployment to the U.S. 6th Fleet area of responsibility (AOR).

 
 
Maritime Contracts Maritime Standards Naval Architecture Pod Propulsion Port Authority Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | 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: 0.2397 sec (4 req/sec)