New engines for inland tug
The ‘Statum’ is typical of many small pusher tugs that operate on the Dutch waterways, many of them owned by their skipper. This tug has a length of just 15.5metres and a beam of 9.2metres and in 2017 the owner decided that it was time to replace the two ageing Caterpillar diesels with something new.
The Statum has regular work and operates for over 5,000 hours annually, pushing two barges which are used to transport 4,000 to 6,000 tonnes of raw materials for cattle feed. The main engines on the Statum were replaced with a pair of Yanmar 755hp diesels and so far the owner is very pleased with the results.
Repowering took five weeks altogether and was carried out in a shipyard in the Dutch town of Urk. The old V-12 Caterpillars were removed via a trunking over the engines and as they were still in working order they were sold off to Africa. The new Yanmars were installed through the same trunking aperture and according to the owners the whole operation went smoothly. “The old engines came out through the trunking and the new ones were hoisted in,” said Gjalt Van der Meer, the owner/skipper. “The gearboxes were replaced at the same time with new units from the Yanmar subsidiary company Kanzaki. These have a reduction of 6.57:1 which results in about 280rpm for the prop shaft, which is a fine RPM for a pusher tug. We took the opportunity to replace the propellers as well which often results in a nice efficiency gain.”
The pusher-barge combination is 176 metres long. The engines have now run almost 2,000 hours and Van der Meer is pleased with them. “They're nice engines and I'm very happy with them. We operate day in, day out and our client wants to be sure of the transport. That means we need durable, reliable engines. Yanmar is relatively unknown as a brand within inland shipping, but they've enjoyed an excellent reputation in the maritime and recreational sectors for years now. One advantage is that these Yanmars still use mechanical fuel injection. They're unpretentious engines that you can still work on yourself if a part needs replacing. And the number of cylinders has been halved now compared with the old engines.”
The engines installed are the direct-injection 6AYM-WET and this engine is also available in electronic variations with common rail injection, the 6AYEM-GT & ET. When it comes to service, says Van der Meer: “The service department is open 24 hours a day, 7 days a week and they make sure that if something should break, parts are available.”
By Dag Pike
Latest Press Releases
Innovative vessel for CEMEX UK is first of next generation of marine aggregate dredgers Read more
MIT deliver Bespoke Exhaust Suspension System by Rubber Design for Sir David Attenborough Research Vessel
MIT has successfully delivered a bespoke exhaust suspension system to Cammell-Laird Shipbuilders in ... Read more
Damen has delivered two of four ASD 3212 tugs to towage and related marine services’ company Smit La... Read more
International equipment supplier Oceanscan has added underwater acoustic positioning technology from... Read more
Welders from Damen Shipyards Galati in Romania recently took part in the 2018 Arc Cup International ... Read more
The 326-metre, 146,000 DWT, cruise ship Norwegian Breakaway arrived in Brest on 28 April for 11 days... Read more