3408 problems

Discussion in 'Peterbilt Forum' started by Jacob-3408, May 18, 2019.

  1. fast1buzz

    fast1buzz Light Load Member

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    Feb 6, 2019
    colorado
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    The thumb button on the control levers does the same thing oxbow is saying either or the pumps without the engine running won't have any pressure until you get it running. When starting there is no pressure until the starter spins the engine for several seconds then develops pressure and locks it up so it takes a lot to get it running hence the ether. Thanks oxbow the more I think about it the more I'm inclined to think that's the problem.Jacob 3408 have you figured it out yet. Haven't heard from you for day or so just wondering.
     
    spsauerland and Oxbow Thank this.
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  3. Oxbow

    Oxbow Road Train Member

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    Idaho
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    Your post regarding the retarder jogged my memory!
     
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  4. baha

    baha Road Train Member

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    Jul 25, 2013
    ga
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    If someone up dated the starter lever and left out the glow plug part that the problem, 3408 must have the glow plugs working to start without spray when eng is cold
     
  5. Deere hunter

    Deere hunter Road Train Member

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    Shallowater Texas
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    It sounds like your supply pump is not running enough pressure should be up around 40 to 50 maybe even 60 pounds !
     
    Tombstone69 Thanks this.
  6. Tombstone69

    Tombstone69 Road Train Member

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    Dec 20, 2018
    Jersey shore
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    That was my thought, probably need the pump rebuilt, sounds like you've done everything but.
     
    Deere hunter Thanks this.
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