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main bearing

  1. Main Bearing Premature Wear

    Cummins Tech Section
    So I have finally started to install the replacement bearings in my 4BTA CPL 0986 that I got from CrewCab59 a while back (thanks!) and I have run into a bit of an issue. When I pulled the old main and connecting rod bearings they were all basically worn out, and the #1 Upper and #5 Lower Mains...
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