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What's This,Should it be like this????

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mullet_Head87, May 21, 2017.

  1. May 21, 2017 #1
    Mullet_Head87

    Mullet_Head87 Medium Load Member

    451
    546
    Apr 19, 2014
    Clearwater
    0
    2017 DD15
    Just got a new Freightliner with DD15 and noticed this unscrewed and up. Looks like u can pump it. Should it be like this or pushed down and tightened. Common sense tells me to screw it down but what the hell do I know. And curious on what is and what it does. Thx!
    IMG_20170521_211144353.jpg IMG_20170521_210927748.jpg IMG_20170521_210940028.jpg
     
    Mullet_Head87, May 21, 2017
    Mullet_Head87, May 21, 2017
    #1
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  3. May 21, 2017 #2
    lowlife

    lowlife Bobtail Member

    21
    23
    Feb 21, 2017
    Minnesota
    0
    Looks like it's the fuel primer
     
    lowlife, May 21, 2017
    lowlife, May 21, 2017
    #2
  4. May 21, 2017 #3
    uncleal13

    uncleal13 Road Train Member

    3,757
    6,199
    Apr 9, 2009
    Humboldt, Sk
    0
    Yup, it is the manual fuel primer pump. To be used if you run out of fuel or restore prime after fuel filter change. You must operate it about 250 pumps, try to start, no more than a few seconds, then do it again.Do not wind over the starter any more than a couple of seconds or you'll ruin the fuel pump. After two or three tries the truck will start.
    So after all of that, yes you can just screw it back down.
     
    uncleal13, May 21, 2017
    uncleal13, May 21, 2017
    #3
    Mullet_Head87 Thanks this.
  5. May 22, 2017 #4
    Mullet_Head87

    Mullet_Head87 Medium Load Member

    451
    546
    Apr 19, 2014
    Clearwater
    0
    Makes since cause truck only had 30 miles on it and barely any fuel in it. Tech must have forgotten to screw it down after priming. This is my first Detroit, I've always had Cummins. Already had a fault code for the intake manifold pressure sensor. It came on while it was doing a routine reGen but went away. From what I read online you can take it off and clean it to hopefully fix it. What are some common faults of the dd15 other than "basic maintenance"to look out for?
    The for the replies!
     
    Mullet_Head87, May 22, 2017
    Mullet_Head87, May 22, 2017
    #4
  7. May 22, 2017 #5
    skellr

    skellr Road Train Member

    8,737
    12,179
    Jul 17, 2011
    The Village, Portmeirion
    0
    You really don't want to idle them, it plugs up the dpf in a hurry and then requires an active regen to clean it out. It will do passive regens while you are driving and shouldn't require an active regen unless something is wrong or there has been alot of idling. The warranty on the after treatment system is only 3 years or something and they won't honor the warranty if there is alot of idling so be careful.
     
    skellr, May 22, 2017
    skellr, May 22, 2017
    #5
  8. May 23, 2017 #6
    Mullet_Head87

    Mullet_Head87 Medium Load Member

    451
    546
    Apr 19, 2014
    Clearwater
    0
    Company truck and will more than likely have it for a year. They'll sell it after 150k miles or so. It has the dreaded Opti idle and revs up to 900 RPM when idling. I'm sure a starter or two will go out.
     
    Mullet_Head87, May 23, 2017
    Mullet_Head87, May 23, 2017
    #6
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