Posts Tagged “Mechanical”

John Deere 6068 at 10,000 Hours

John Deere 6068 at 10,000 Hours

It’s hard to believe, but our “new” John Deere 6068AFM75 is now nearly 9 years old, has been around the world, and has now clocked up over 10,000 engine hours: Hours: 10075.1 Nautical miles traveled: 69,187 Fuel burn: 59,257.4 gallons Load factor: 44.2% Longest ocean crossing: 3,689 nautical miles (St. Helena to Barbados) Over the…

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Fuel Quality Differences

Fuel Quality Differences

When considering fuel quality, we’ve always thought first about water, rust, and other impurities in the fuel. Knowing we intended to travel the world and expecting poor quality fuel in the many less-developed countries we would visit, we left Seattle with 48 primary filters on board. What we have learned is that fuel quality is…

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Trondheim Projects

Trondheim Projects

We completed a number of boat projects in Trondhiem, including replacing a steering pump and the nav computer. Most were waiting on gear sourced on our return trip to Seattle—we spent much of the ten days after the trip installing and stowing parts. Below are highlights from July 14th through August 14th in Trondheim, Norway….

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Battery Bank Life Expectancy

Battery Bank Life Expectancy

Most battery manufacturers specify battery life expectancy in terms of number of cycles at a certain maximum discharge level. Transforming this data into the expected or remaining battery life for a house bank is challenging. In measuring the number of cycles, for example, what depth of discharge qualifies as a “cycle”? Our house bank consists…

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London Projects

London Projects

We didn’t spend all our time in London socializing and taking in the sights. We also completed a number of projects, for the boat, the web site, ourselves and even Spitfire. Below are highlights from Feb 13th through April 12th in London, UK. Click any image for a larger view, or click the position to…

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Exhaust Cooling Fault

Exhaust Cooling Fault

The dry exhaust system on Dirona is well-built and reliable. The way it works is the stack heads up through the boat in a 5-inch pipe to release exhaust gas at the top of the stack. The exhaust pipe is enclosed in a larger pipe where it passes through the boat. This larger pipe provides…

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Southampton

Southampton

Prior to the thirty-one days in Southampton, the longest time we’d ever been in the yard was ten days. During our month-long Southampton yard trip we completed three major projects: replacing the muffler, rebuilding the crane, and replacing the cutlass bearings on the rudder shaft and the wing and main propeller shafts. We also completed…

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Cutlass Bearing Replacements

Cutlass Bearing Replacements

The final major project we completed at Saxon Wharf in Southampton was replacing the cutlass bearings on the rudder shaft and the wing and main propeller shafts. On inspection after removing the cutlass bearing, our main propeller shaft was badly corroded with some of the pits running quite deep, so we opted to replace it…

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Crane Rebuild/Remanufacture

Crane Rebuild/Remanufacture

A second major project that we completed while in the yard at Southampton was to rebuild our crane. It was in remarkably poor condition. The ram-to-extension bolts were siezed due to lack of Tuff-Gel application on the stainless screws in the aluminum casting; the linear winch had worn away all its bearing material, damaging the…

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Muffler Replacement

Muffler Replacement

We had a long list of projects to complete during our Southampton haulout at Saxon Wharf. One of the bigger jobs was to replace the muffler. Our old one turned out to not be in bad shape, and might have gone a few more years. But we couldn’t really know the state of the muffler…

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On the Hard at Saxon Wharf

On the Hard at Saxon Wharf

Boats have been damaged or destroyed during lift operations, so we’re always nervous whenever we haul Dirona out. We were impressed with the care Saxon Wharf took in the lift, including asking for exterior hull photos to could assess where to place the lifting straps. The operation went smoothly and by mid-morning we were safely…

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Engine Work for Christmas

Engine Work for Christmas

We had an intermittent engine control unit fault code on Dirona‘s John Deere 6068AFM75 that started shortly after we departed Kinsale, Ireland. Under higher loads or at idle when running the hydraulics, we sometimes get a 1347.7 fault code which indicates the actual fuel rail pressure is different from the called-for pressure. This occurs is…

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Racor CCV

Racor CCV

I’ve never been happy with the RACOR CCV (Closed Crankcase Ventilation) system on our Deere engine so I decided to dig in and learn more. To meet emission requirements, the CCV (the black housing circled above) separates oil from the crankcase vapors, drains the oil back to the sump and sends the vapors back to…

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Diesel Engine Load Profile

Diesel Engine Load Profile

Electronic diesel engines track usage data to help engine manufacturers and service personal understand causes of different fault conditions and evaluate how well the engine is performing in that specific application. Generally this data isn’t available to end users but, if a service technician is on your boat, it’s worth asking for the engine load…

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Two Generators When You Only Have One

Two Generators When You Only Have One

The best way to have two generators is to actually install two generators. But two generators would be a tight fit in our engine room. Milt Baker proved on Nordhavn 4732 Bluewater that, with skill and forward thinking, you actually can fit two generators into a Nordhavn 47 or 52. It is a rare configuration. Most,…

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Managing Fuel Quality

Managing Fuel Quality

When we left Seattle on our trip around the world, we were expecting fuel quality issues to be common and carried 48 Racor 900 fuel filters. Surprisingly, we used less than ten on the entire trip. Most of the fuel we got world-wide was surprisingly good. We did encounter some minor fuel quality issues, but…

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