Page 91: of Maritime Reporter Magazine (August 2018)

ing, and has a twin-screw geared diesel Thordon Distributor, RMH Industries, in August 2017 icebreakers, the CCGS Ann Harvey propulsion system with two Wärtsilä handled all of the machining to recondi- Since then, Avalon Marine has re- and CCGS Wilfred Laurier to the latest

Vasa 16V22 engines driving CP propel- tion the propeller shafts and machine the cently completed engineering studies Thordon speci? cations. These projects lers. The change to seawater lubrication new bearings. The ship went back into for upgrading the tailshaft bearings on are expected to be undertaken during the was a decision made by the CCG as part service with all new bearings and WQPs two CCG Type 1100 Class 2 medium ships’ 2018 drydockings.

of their commitment to environmentally friendly vessel operation. Thordon sup- plied COMPAC bearings, a WQP, and

Baltimore’s Full Service the shafts were protected against wear and corrosion with Thordon’s Thor-Coat

Ship Repair Yard two-part toughened epoxy system. Thor-

Coat was speci? cally developed to com- ?&RQYHUVLRQV 5HWUR¿WV plement Thordon COMPAC bearings by ?6HUYLFH$Q\ZKHUHLQWKH3RUW providing corrosion protection to meet ?$URXQGWKH&ORFN6HUYLFH extended shaft withdrawals. ?'U\'RFNDQG:HW%HUWK6HUYLFHVDWRXU.H\ +LJKZD\/RFDWLRQ

Louis St Laurent ?)ORDWLQJ(TXLSPHQWWR6HUYLFH9HVVHOVDW&DUJR3LHUV

CCG’s largest and heaviest icebreaker, the CCGS Louis St Laurent, was ? rst commissioned in 1969, with steam tur- bine propulsion. It has undergone sev- eral major re? ts and at least one life extension since it was commissioned, including upgrading to a triple-screw “A Baltimore Tradition with Over Ninety Years in the Same Location” diesel electric system based on ? ve MaK 16V453Cs prime movers. When one re-

MOBILE 24 HOUR SERVICES FOR:

EMERGENCY/ MAINTENANCE ? t found that the original dovetail stave

FIELD & SHOP REPAIRS bearings were severely worn, CCG con-

MACHINE SHOP/ FABRICATIONS sidered several repair options to keep the ship in service for another 10 years or so, when Canada’s long-awaited replace- ment heavy icebreaker CCGS Diefen- 1449 Key Highway | Baltimore, MD 21230 baker may be delivered.

3+?);

Avalon Marine was again approached [email protected] www.generalshiprepair.com by CCG to put forward a proposal for repairing the existing bearings in order to extend the operating life of the stern tubes.

“It became clear early on that in order to justify the costs of upgrades, SCM implementation would be needed in or- der to reduce the life cycle costs for the remaining life of the ship,” said Avalon

Principal Thom Hofmann. “A number of life cycle cost scenarios were completed by Avalon taking into account the costs of implementation and upgrades as well as the periodical survey cycles required by Class.”

The outcome was a series of contracts between CCG and Avalon Marine to engineer, assess, submit and obtain the

Class approvals as well to design the bearing upgrades and shipboard equip- ment integration. Based on Avalon’s contract, Thordon supplied three full shaft line sets of full form Thordon XL bearings and three custom water quality packages to continuously condition the bearing lubrication water. This was the ? rst time Thordon WQP’s had been cus- tomized and integrated into the existing propulsion cooling water system of the ship, without dedicated pumps. Avalon worked very closely with the shipyard handling the dry docking. Quebec-based www.marinelink.com 91

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