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Tractor Talk Discussion Forum

perkins engine

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mf294

07-03-2005 07:30:38




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Have a mf294 with 5700 hrs on it. Runs good for that number of hrs. and is light duty now but been thinking about changing the main and rod bearings. Brother is a firm beliver in changing them in his heavy use tractors every few thousand hours. This project is more than removing the pan, loader and 4x4 componets have to be removed. If I go that far to check them, I would replace them. I usually don't work on anything unless it is broke but bearings would be a cheap peveantive action. What's your thoughts?

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Joe(TX)

07-05-2005 09:43:12




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 Re: perkins engine in reply to mf294, 07-03-2005 07:30:38  
Not checking them is the main reason you see rods through the block. The broken cap as desribed in one of the other posts is a reason to check, not a reason not to. 5700 hrs at light use may not be that bad. 10000 hrs is way too many. Heavy use, I would change the bearings in not more than 2000 hours. ASAE defines the life of an engine is when you have spent the original cost of a piece of equipment on repairs.

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Tramway Guy

07-03-2005 18:44:10




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 Re: perkins engine in reply to mf294, 07-03-2005 07:30:38  
I recently had a conversation with an engine rebuilder that had a Perkins 236 engine he had obtained from another guy that had decided to rebuild it. The owner had broken a main bearing cap and for some reason, they are not obtainable separately. So the engine instantly became scrap. So I wouldn"t teardown an engine just for the heck of it unless there is some indication of trouble such as oil analysis or other symptoms.

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Majorman

07-03-2005 09:45:09




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 Re: perkins engine in reply to mf294, 07-03-2005 07:30:38  
In my humble opinion it is a total waste of time. If you need new bearings then you will also need to regrind the crank. If the oil pressure is normal and the engine has been serviced at the correct intervals, Perkins engines should do about 10,000 to 12,000 hrs minimum. Usually you will find that she starts to smoke from the breather or becomes a bad starter. At that time overhaul the complete engine and get her ready for another period of hard work.

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Majorman

07-03-2005 09:40:57




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 Re: perkins engine in reply to mf294, 07-03-2005 07:30:38  
In my humble opinion it is a total waste of time. If you need new bearings then you will also need to regrind the crank. If the oil pressure is normal and the engine has been serviced at the correct intervals, Perkins engines should do about 10,000 to 12,000 hrs minimum. Usually you will find that she starts to smoke from the breather or becomes a bad starter. At that time overhaul the complete engine and get her ready for another period of hard work.

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