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cummins 855 block, what's this fitting for?

msgjd

Well-known member
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upstate ny
i have a commercial engine i took out of an M818 and it doesn't have a fitting in this location but it does have a threaded plug in that spot .. It's right below the accessory drive and it dumps into the top of the secondary (lower) accessory drive

Is the fitting seen used as a place to dump oil back into the oilpan after going through an external accessory? thanks in advance

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