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Northern Lighthouse Board (NLB) have a requirement for an engine overhaul, their starboard fwd engine, on board the NLV Pharos. NLV Pharos is a DP(AA) Buoy Tender, with a diesel electric power plant consisting of five Wärtsilä L20 Marine Engines. Three engines are 1440kW rated 8L20, with the remaining two being 720kW rated 4L20, one of which (Starboard FWD) being the subject of the following scope. This engine now requires a 40,000 hour major service, which is required to be overhauled by an experienced contract in January 2027. Brief scope of works: 1.Preparatory & Ancillary Component Work •Cylinder Heads: Prior to the installation of NLB-supplied reconditioned heads, replace the following items: rocker arm screws, yoke & adjusting nuts, and injection valve yoke tension screws. •Fuel Equipment (Pre-Service / Ship's Staff): Fuel pumps and injectors will be removed by ship's staff prior to the Supplier’s arrival. Fuel pumps will be sent ashore for overhaul by a third party, and injectors will be overhauled by ship's staff. These components are scheduled to be back onboard and ready for reinstallation by the Supplier during the service period. •Valves & Governor Components 2.Power A
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