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| Chased a low oil pressure issue on an m11 last summer. I changed the oil pump thinking that was the issue but didnt change a thing. Started pulling rod caps and the bearings were starting to flake pretty bad. Figured out after i pulled the regulating valve out that the bearing flakes had stuck the plunger in the barrel and it was just dumping oil. Its a lot easier to check out the pressure regulating valve than to change the oil pump. | |
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Cummins M11 oil pressure issue
