Try doing this at anchor off somewhere like Dubai or Singapore or Hong Kong with the outside temperature 40 degrees, and when the engine is still hot, with hot oil dripping down on you inside the crankcase. Looks fairly easy, but the reality is that it is pretty back breaking work. Brilliant video and would have made our jobs easier if we had this to view when I was at sea.
Ah yes I remember it well. Doxfords mostly, Harlands, B&W, 1966 to 1972. This is looks like it was filmed at the Engine Builders and not on a ship. Where's all the oil covered surfaces in the Crankcase. My overalls only looked like that when I took them out of the bag brand new. Think the Doxford was a 750mm Dia bore.
The guy who posted this great video has done a marvelous job, the simple layman watching the video is exhilarated pretty easy work!! The guys working in the video are seasoned professional master mechanics (charge hands) make no mistake it takes years to perfect the craft there's no chance for error period, it's 100 percent or 0% .Sennen Antonio Dourado Wisconsin Milwaukee Mumbai India
you start watching one of these, and you just can't stop until you see how it turns out. You just have to make sure the piston goes back into the cylinder. The suspense is overpowering.
@@ajingnineba5250 you should post your comment at the top level, click where it says - add a public comment (geesh, now I had to watch the whole thing again. After two years, I couldn't remember how it turned out.)
If only every maintenance procedure was documented and explained this well at the place I work - would make training and getting guys up to speed so much easier.
FELICITACIONES POR EXCELENTE TRABAJO DE MANTENIMIENTO SIGUIENDO LOS PASO A PASOS CORRECTOS CON MUCHA ETICA Y PROFECIONALISMO COMO TAL, FELICITACIONES AL EQUIPO DE TRABAJO BENDICIONES Y SALUDOS DESDE MONAGAS VENEZUELA. ESTOY SUSCRITO EN EL CANAL
It becomes even more impressive when you realise that Diesel engines, especially large medium and low speed marine engines like this one, will run on pretty much anything. They can even run off of unrefined _crude oil._ So if you have a ship or a power plant that runs one or more of these engines, you can just use crude oil to power them, although they mostly use Heavy Fuel Oil (HFO, a.k.a "bunker fuel" or "bunker oil") or things like Low Sulphur Fuel Oil (LSFO), Marine Gas Oil, or Marine Diesel Oil. And to all you idiot greenies with your hair on fire: 1. These engines can run off of LNG, LPG, methane, ethane, propane, butane, methanol, and ethanol as well. 2. You don't even need to modify everything to run on just natural gas. Diesel engines are inherently dual-fuel capable. 3. And most importantly, Selective Catalytic Reduction and exhaust gas scrubbers exist for a reason. And they exist because the exhaust gases contain lots of NOx, and sulphur too if you're running high-sulphur fuel like sour crude oil. But the SCR system helps cut down on NOx emissions, decreasing the formation of smog, and the scrubber helps to remove sulphur, phosphorus, heavy metals (mercury and lead primarily), and other harmful substances. The scrubber's ability to remove almost all of the sulphur from the exhaust gases means that the amount of acid rain formed is so little you don't even have to worry about it. As a result, the container ship that you see out there, despite being powered by a two-stroke Diesel engine that burns extremely dirty fuel, can still have very low emissions. There, you happy now?
All the safety equipment stuff at the beginning and the guy isn't even wearing eye protection. Glad nothing fell when he stuck his head inside! Great video though, I love these instructional videos, very informative ;-)
I see paint stick marks on the piston skirt bolts and It makes me think it's for indexing the bolts so the locking wire hole location in the correct spot. Either that or for torque turn method of final torque spec.
they are working smooth but infact u will face many problems during overhauling some time hydraulic jacks problems, nuts and other components stuck ect and will take extra time.
Reminds me of a giant valve in a cylinder head more than a piston and con rod. No wrist pin eh? I need to look up exactly how this is set up... I wonder what an assy like this would cost! I couldn't afford the bolts !
Can not found any information for inspection (measurement and clearance) Piston skirt. please advice while and reason for replacing bronze ring on piston skirt
This is the shortcut way if you do what manual says you need to install the tilting tools which you delay about 1 hour. The technique how you handle the engine room crane perfectly. 😊😊
Looks like the stuffing box keeps the piston lube oil in the area between it and the piston. I have been wondering why the crankcase was so clean and dry. But how is the oil circulated and filtered? Is it kept separate from the bottom end oil?
There are two kinds of oils in these engines. One for the combustion chamber, which comes from the alpha lubricators and pumped through holes at the top of the cylinder liner, and one for the more classical mechanical interfaces, which never comes in contact with the soot of the combustion chamber and can therefore in certain cases never be replaced (yeah... a 28years old engine without a single oil change... seen it).
@@nikitapottier3611 ... Makes perfect sense and when you have this much room to play with you can compartmentalize all you wish. Beautiful design really. Only feasible when dealing with this sort of size tho...
Belive me, working in the crank space, you get covered in lube oil. It is no way that clean. Been there many times....!both Gotterverkan and Man engines... all good fun at the time....!
Dear sir, I am working on 6s50mc. Engine, installed in 1996, please provide me the cylinder head overhaul videos. Cylinder head is fitted with hydraulic ring and hydraulic nuts... Kindly send me the procedure for opening and tightening these nuts
Can someone tell me how the connecting rod moves straight up and down,with no side to side motion like most all other engines I'm familiar with? How would it connect to the crankshaft without moving side to side? Thx
It’s a cross head design. The crank and connecting rod are below the cross head which takes the lateral loads while leaving the the piston isolated from those forces.
I was thinking to myself ‘look how clean their coveralls are.’ That’s my indication as to the level of reality to true working conditions. I’m no marine technician but i know a training aid from a workhorse when I see one.
Just found this video, your question is 2 years old however if you couldn't sleep and still wondering well the OEM recommended interval between piston overhaul is 8,000 hours. That corresponds to 320,000 miles on a car averaging 40MPH. Unfortunately my experience with those MAN designed slow speed engines is we had to overhaul more often due to various breakage before reaching the normal running hours. When that happens in the middle of the ocean in a hot region trust me the engine is not that clean nor as cold as in the video and you better be fit if you will be the one disconnecting the cross from the con rod and dismantling the stuffing box. You get literally showered with lub oil at 70-80 Deg C. The metal from the engine burns your feet through the sole of your working boots. Plus add the ship rolling side to side, 3.5 tons piston swinging under the crane, stay clear! It can be hell in Eng. Room. I also saw the piston cooling carrier coming out of the crankcase. Fun days that was... Usual time would be around 10 hours to complete the job when everything went well and with a trained Engine team. Every 1 hour or so the Captain would call you on the phone and ask if the repair is soon to be finished. At least a good Captain would bring cold drinks during the work and then would give a case of beer to the guys once we got back under way.
@4:53 the conduction coil thats wrapped around the fitting has either exhasperated or dis assimilated either shrank or dissolved over longevity of products lifetime warrenty
Why can't my life be like this. When I'm on a project like this it's more like,,,, Special tools? Make something in the shop. Parts? We have welders and some random worn out machine tools from 1912, fix the old parts. Help? We gave you a whole crew of crack smoking Oompa-Loompas who speak an obscure dialect of a language you never even heard of before. Then of course they always ask "What's taking so long?"
