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Old 09-15-2020, 05:35 PM   #1
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Turbo oil feed line

I have a 2003 Monaco with an ISB300. I noticed the turbo oil feed line looks like it could be replaced, so I started looking for one.

I looked around and every one I found has flare or AN fittings on both ends. Mine has a banjo type fitting on the end that attaches to the cylinder head and a90 degree AN style on the turbo.

Can anyone tell me which feed line is the correct one?

Thanks
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Old 09-15-2020, 06:01 PM   #2
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Do you use the Cummins quickserve site?
Using your engine s/n you'll be able to get the Cummins part number and source it that way....
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Old 09-15-2020, 07:00 PM   #3
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Take the old hose to a hydraulic shop. They have all kinds of fittings and make a hose for you, most likely while you wait
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Old 09-15-2020, 08:23 PM   #4
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Mine looks terrible, I asked Cummins Great Plains about replacing it, the shop manager said looks are immaterial, if it isn't leaking,don't worry about appearance.But then, mine is only 21 yrs old.
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Old 09-15-2020, 08:48 PM   #5
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Mine looks terrible, I asked Cummins Great Plains about replacing it, the shop manager said looks are immaterial, if it isn't leaking,don't worry about appearance.But then, mine is only 21 yrs old.
Mine look pretty rough. I'd hate to lose oil pressure to the turbo, or worse yet puke all of the engine oil out onto the highway. That could get real expensive, real fast.Click image for larger version

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Old 09-15-2020, 08:54 PM   #6
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Thatís a pretty alarming amount of corrosion. I would be replacing them too. If they will come apart. Iím guessing they will have to be cut off and a socket used to remove them.
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Old 09-15-2020, 10:27 PM   #7
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Ya, that's really bad corrosion, I was talking about the rubber line appearance. That metal corrosion is concerning, even the threads on the spring tension clamps for the turbo piping.
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Old 09-17-2020, 09:15 PM   #8
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Ya, that's really bad corrosion, I was talking about the rubber line appearance. That metal corrosion is concerning, even the threads on the spring tension clamps for the turbo piping.

So I found all of the correct replacement hoses and fittings. $500 later and the parts will be shipped to me next week. None of them leak, but for me the price was worth the peace of mind. Breaking any one of those lines far from home would be a real bummer.
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Old 09-23-2020, 07:47 PM   #9
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So I found all of the correct replacement hoses and fittings. $500 later and the parts will be shipped to me next week. None of them leak, but for me the price was worth the peace of mind. Breaking any one of those lines far from home would be a real bummer.
You should be on a sailboat 500 miles from anywhere
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Old 09-26-2020, 04:47 PM   #10
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You should be on a sailboat 500 miles from anywhere


Oil and coolant feed lines replaced. Also found the air line to the boost gauge broken. Thatís why the gauge wasnít working and was hearing an air leak. Repaired that too.

Feel much better now.
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