How to disable mechanical governor on 1987 Mack

Discussion in 'Mack Forum' started by precaster, Jun 25, 2017.

  1. precaster

    precaster Bobtail Member

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    Jun 25, 2017
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    My precast concrete delivery truck has been limited to 55 mph, it would be nice to go the speed limit.
     
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  3. baha

    baha Road Train Member

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    Jul 25, 2013
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    Follow the speedo cable and see if it leads to a box, you can dis connect it 1st to see if thats your gov.
     
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  4. Brerran

    Brerran Bobtail Member

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    Aug 1, 2018
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    Did you ever find a way to remove your Mack's governor? I'm having the same issue with my CH612. It defuels at 1500 rpms and 55mph
     
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