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1978 White Road Boss Question

Discussion in 'Trucks [ Eighteen Wheelers ]' started by SchoenAGServicesLLC, Aug 29, 2014.

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  1. Aug 29, 2014 #1
    SchoenAGServicesLLC

    SchoenAGServicesLLC Bobtail Member

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    Aug 29, 2014
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    We recently bought a 1978 White Road Boss. It has seen better days. But my Main question is there is a knob on the dash that has linkage to the front of the motor. What is it for? It has a cummins motor. I believe its a 350
     
    SchoenAGServicesLLC, Aug 29, 2014
    SchoenAGServicesLLC, Aug 29, 2014
    #1
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  3. Aug 29, 2014 #2
    Cat sdp

    Cat sdp . .

    19,886
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    Orion's Belt
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    Could it be a hand throttle...??
     
    Cat sdp, Aug 29, 2014
    Cat sdp, Aug 29, 2014
    #2
  4. Aug 29, 2014 #3
    SchoenAGServicesLLC

    SchoenAGServicesLLC Bobtail Member

    5
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    Aug 29, 2014
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    No there is a seprate knob for that. This one runs to the left front of motor just above water pump not to the injection pump
     
    SchoenAGServicesLLC, Aug 29, 2014
    SchoenAGServicesLLC, Aug 29, 2014
    #3
  5. Aug 29, 2014 #4
    The Challenger

    The Challenger Kinghunter

    7,127
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    Dec 22, 2007
    East Central FL
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    Can you post a pic??? It will help the expert mechanics on here.
     
    The Challenger, Aug 29, 2014
    The Challenger, Aug 29, 2014
    #4
  7. Aug 29, 2014 #5
    OFTOTR

    OFTOTR Medium Load Member

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    Jul 19, 2011
    Toccoa GA
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    I don't remember what the linkage was for the engine shut down thing on the old detroit 238?
    Maybe the cummins is not the original engine?
     
    OFTOTR, Aug 29, 2014
    OFTOTR, Aug 29, 2014
    #5
  8. Aug 29, 2014 #6
    barroll

    barroll Road Train Member

    1,096
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    Nov 23, 2010
    Southwest Michigan
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    The VT-903 (and 855) had an option for a manual fuel shut off. If the cable on the knob goes to the fuel pump, it's a good bet that's it.
     
    barroll, Aug 29, 2014
    barroll, Aug 29, 2014
    #6
  9. Aug 29, 2014 #7
    SchoenAGServicesLLC

    SchoenAGServicesLLC Bobtail Member

    5
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    Aug 29, 2014
    0
    Could it be a commpresion relief valve?
     
    SchoenAGServicesLLC, Aug 29, 2014
    SchoenAGServicesLLC, Aug 29, 2014
    #7
  10. Aug 29, 2014 #8
    BeenJammin

    BeenJammin Light Load Member

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    Dec 17, 2013
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    That's a manual emergency door locking system in case of a 1693 approaching from behind. That would keep your doors from being blown off.:yes2557: Joking mate, or telling the truth. Cledus wasn't lying when he said "maybe I should just introduce them to the old boy". Hold on Fred.
     
    BeenJammin, Aug 29, 2014
    BeenJammin, Aug 29, 2014
    #8
    snowblind Thanks this.
  11. Aug 29, 2014 #9
    kat man

    kat man Light Load Member

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    Nov 29, 2009
    orleans in
    0
    Bingo, I think we may have a winner.
     
    kat man, Aug 29, 2014
    kat man, Aug 29, 2014
    #9
  12. Aug 29, 2014 #10
    Mooose

    Mooose Light Load Member

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    Apr 13, 2014
    Sherwood Park,AB
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    Shutter control for the rad??
     
    Mooose, Aug 29, 2014
    Mooose, Aug 29, 2014
    #10
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