Volvo DPF / SCR problems

Discussion in 'Volvo Forum' started by Val77, Feb 4, 2018.

  1. Val77

    Val77 Light Load Member

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    @mover man
    Your truck is EPA 10 or 13 . Also it's Volvo. After 2010 Volvo truck with Volvo engine are only equipped with I-Shift transmission. As @nasriza said - your output speed sensor is located at the very back at the right side of the transmission. Unplug it and make sure to put some tape over the harness connector so you don't have to deal with I-shift electrical issues. Once you start driving you will not have speedometer and shifting will be different than normal but it will be ok. Also do you have manual shifter for your trans? If you do use it in manual because in auto you'll loose power. Hope that helps
     
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  3. Val77

    Val77 Light Load Member

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    That's correct. The 7th injector is located just after the turbo - mounted on top of the Venturi pipe and there are 2 types. One is electric module and the other is dirrect pressure doser. As a PM i like to clean them and replace gaskets every 6 months. Extremely common issue is clogged doser head. Very simple to do
     
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  4. nasriza

    nasriza Road Train Member

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    So here is something not a lot of people know about the diesel doser specially on volvo with EPA 13 should be 2013 and up, the highest failures of dosers actually comes from the control valve or control block which is located on driver side right in the middle of the engine, that being said that control block has a feed of constant air pressure to boost up injection pressure if you go down the line right by the air dryer there is a check valve that needs to be replaced as well with it, and all the failures mainly come from the one and only air dryer cartridge not being serviced at proper intervals or being replaced with something from older truck with out the coalescing abilities and it is letting a bit of oil in the air system making a bunch of problems down the line. most people just replace the actual valve not a huge deal about 350 at volvo no one sees the system as a whole and they have repeated failures within a year.
     
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  5. CoyoteExpress

    CoyoteExpress Medium Load Member

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    ROOOOOFL
    just for you ...
    we write the Year Anno 2003 Merzedes Main Factory Plant Wuehrt send 3 Actros MPx later called MP3 on the Road with test Registration... Trucks was the first on longrun test with AdBlue, distance Radar, Adoptive cruse control, line assisted, EMC Brake Assisted, Disk Brakes .......
    I was one of the 4 Drivers who get the right to drive them.
    so don't tell me i have limited or no knowlege on that.
    Probably you don't know WHY the DEF tank lid is blue!

    Sorry Val77 but you got 36 Postings and show up and you like to tell us now that you are now our holy saver..
    lol
     
  6. Val77

    Val77 Light Load Member

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    Driving something with DEF doesn't mean understanding something with DEF. All it means is--------- 15 years ago you've drove it........and 15 years after you drove it you still don't understand it my man .
     
  7. nasriza

    nasriza Road Train Member

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    Funny thing is that at least 60% of people working on this #### have no idea what is going on with def at least 60% if not more.
     
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  8. Val77

    Val77 Light Load Member

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    I completely agree with you. Most of the time just following the service steps on the particular diagnostic tool one is using is npt enough. Common sense and thinking outside the box is needed. I'd probably say 80 to 90% of mechanics don't understand it correctly.
     
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  9. Rob100100

    Rob100100 Light Load Member

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    Mar 5, 2016
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    Do you mean replace the air dryer and cartridge or just replace the cartridge every year?
     
  10. Val77

    Val77 Light Load Member

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    Only cartridge if air dryer is 100% functional
     
  11. daf105paccar

    daf105paccar Road Train Member

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    If you live in a humid climate i would replace it 2 times a year.
    Once before winter/rainy season,once after.
    Specially if the compressor is getting on in years.
     
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