06 Mack CXN613 vibration

Discussion in 'Mack Forum' started by 4x4_Welder, Oct 7, 2014.

  1. 4x4_Welder

    4x4_Welder Medium Load Member

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    Sep 16, 2014
    Eastern Orygun
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    There are four Mack CXN613s at my yard, all four have a rather pronounced engine vibration in the 750-850rpm range. These are all old Casa trucks, running I think 427 Econo engines and Eaton Automated transmissions.
    Just curious about this, as the Cummins and Cat equipped trucks I normally deal with don't have this issue at all.
     
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  3. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Jun 14, 2009
    romulus,mi
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    I work on a fleet of ABF Mack's.Change your motor mounts.I don't know why they all seem to go bad.May not look bad at first glance,but they are.Good luck.
     
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