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Need help from any DD16 guru's.

Discussion in 'Freightliner Forum' started by Codynidaho, Jun 2, 2017.

Page 6 of 14
  1. Jun 4, 2017 #51
    mhyn

    mhyn Road Train Member

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    Dec 29, 2008
    Northridge, CA
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    anyway lets hope he will start the engine. BTW that small hand pump is able to make 100 psi in fuel filter housing if works properly. I guess he will need to change that small hand pump. I don't know j-47912 can make 95 psi .
     
    mhyn, Jun 4, 2017
    mhyn, Jun 4, 2017
    #51
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  3. Jun 5, 2017 #52
    RocketyMan

    RocketyMan Medium Load Member

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    On the low pressure side, you should see about 110 PSI when running. When you approach 125 PSI or higher, it suggests the filter is getting clogged--something along those lines.
     
    RocketyMan, Jun 5, 2017
    RocketyMan, Jun 5, 2017
    #52
  4. Jun 5, 2017 #53
    Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    I checked the filters. They are clean... And I did the hand pump the other day for about 20 Minutes straight... Not kidding and didn't stop. I actually got blood blisters on my hands from it. Lol and it didn't even attempt to fire. I know the hand primer works because I use it everytime I change the filters.
    I'm still waiting on fitting which should arrive today. Once I get it, I'm gonna try and pump fuel through and also pump fuel through while I turn it over. So we'll see what happens.
     
    Codynidaho, Jun 5, 2017
    Codynidaho, Jun 5, 2017
    #53
  5. Jun 5, 2017 #54
    magoo68

    magoo68 Road Train Member

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    Jun 11, 2011
    st malo mb canada
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    I've used the fuel vent hose on the fuel tanks to add a small amount of compressed air which the check valve holds in each tank . Pumped primer a bit and it normally starts right up then I slowly open fuel tank cap to release pressure
     
    magoo68, Jun 5, 2017
    magoo68, Jun 5, 2017
    #54
    mhyn Thanks this.
  7. Jun 5, 2017 #55
    Codynidaho

    Codynidaho Light Load Member

    87
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    Apr 8, 2016
    Cheyenne, Wyoming
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    I just used the hand primer again and if I do it slowly I can hear the fuel filling the primer up after I release it. Sounds bubbly though, as if Its sucking in air and fuel. Maybe the primer went bad recently and it's just pushing and sucking the same fuel in and out. Or there's a check valve somewhere that's stuck
     
    Codynidaho, Jun 5, 2017
    Codynidaho, Jun 5, 2017
    #55
  8. Jun 5, 2017 #56
    mhyn

    mhyn Road Train Member

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    Dec 29, 2008
    Northridge, CA
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    The hand valve is bad I guess. it is pushing and sucking. last year I had leaking gasket on High Pressure pump's fuel flange. When I took off fuel flange fuel came out. Also I removed the 2 stage valve for inspection. After assembling all parts I pumped ~200 times and handle got tight. Fired the engine and it started after 5-7 second of turning. That small pump costs ~$65 at dealer . on ebay you can find it cheap. here's the link for the one that goes on dd15 3 filter system.
    OEM Bosch Diesel Hand Primer - Replaces screw-down type. Fits MANY applications!
     
    mhyn, Jun 5, 2017
    mhyn, Jun 5, 2017
    #56
  9. Jun 5, 2017 #57
    Codynidaho

    Codynidaho Light Load Member

    87
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    Apr 8, 2016
    Cheyenne, Wyoming
    0
    That's the kind I have. I'm gonna tear it apart and see if I can see anything worn in it. My fitting for the primer comes in tomorrow so I'm just gonna use that instead of spending more money.
     
    Codynidaho, Jun 5, 2017
    Codynidaho, Jun 5, 2017
    #57
  10. Jun 6, 2017 #58
    RocketyMan

    RocketyMan Medium Load Member

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    Yeah, I'd be very curious if your hand primer has a leak in it. It does sound bubbly to you--so it is quite possible.
     
    RocketyMan, Jun 6, 2017
    RocketyMan, Jun 6, 2017
    #58
  11. Jun 6, 2017 #59
    Codynidaho

    Codynidaho Light Load Member

    87
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    Apr 8, 2016
    Cheyenne, Wyoming
    0
    I took it apart and pumped it with it off the truck and it seemed to push fuel. But it would be to hard to tell if it's bad once there is pressure. Owell. My external pump comes in today so I'll just prime the system that way.
     
    Codynidaho, Jun 6, 2017
    Codynidaho, Jun 6, 2017
    #59
  12. Jun 6, 2017 #60
    Codynidaho

    Codynidaho Light Load Member

    87
    20
    Apr 8, 2016
    Cheyenne, Wyoming
    0
    Can anybody tell me what the thread count and diameter of the quick connect fitting is? I still haven't got it but I need to get a hose barb/thread adapter to put between the pump hose and QC.
     
    Codynidaho, Jun 6, 2017
    Codynidaho, Jun 6, 2017
    #60
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