2015 Mack Granite RollOff PTO problems

Discussion in 'Mack Forum' started by Sanman1, Jan 9, 2019.

  1. Sanman1

    Sanman1 Bobtail Member

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    1
    Jan 9, 2019
    0
    New to the site and wanted to say hi before asking for help,

    Im driving a 2015 Mack Granite RollOff with 41K on it and recently when I turn on the PTO it still always activates the hydraulic pumps but now is NOT disengaging the Idle shut down mode, is NOT activating the rev limiter and is NOT activating the governor to prevent the transmission from shifting past the first gear. If I had to guess i would say that the switch is not communicating with the Mack truck computer but is still communicating/working with the pumps themselves. Has anyone ever have this problem or heard of it and what can I do to fix it ? any help is appreciated and thank everybody in advance.
     
    bullhaulerswife Thanks this.
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  3. Tombstone69

    Tombstone69 Road Train Member

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    Does the high idle run through the cruise maybe check the cruise.
     
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