Davco 382 / fuel filter not filing up

Discussion in 'Ask An Owner Operator' started by henboy1, Jun 20, 2020.

  1. jamespmack

    jamespmack Road Train Member

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    Some times they plug fast, some slow.

    However the davco works on vacuum. You fill the housing full. Start it to make sure air is out. After a few minutes crack the top cap and watch the level go down. When it's a inch above the bottom tighten cap. This is the proper procedure. But dont let it go to low. You will need to start over.
     
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  3. nikmirbre

    nikmirbre Road Train Member

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    So fill it all the way to the top, start it....make sure air is out. While running, open the top and watch it fall?
     
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  4. bad-luck

    bad-luck Road Train Member

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    If your fuel level is low you are fine. When the bowl is full your filter is clogged.
     
  5. JonJon78

    JonJon78 Road Train Member

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    Might have a bad back flow valve.
     
  6. henboy1

    henboy1 Medium Load Member

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    So, the ball I changed had no effect ? Makes me think the housing itself may be bad and not just the ball and spring that I just changed . Intetesting
     
  7. black_dog106

    black_dog106 Road Train Member

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    What Crude Trucking said
     
  8. jamespmack

    jamespmack Road Train Member

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    Yep. Close it up about 1 inch above black ring.
     
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  9. nikmirbre

    nikmirbre Road Train Member

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    Ok, Ive been doing it wrong all along! Also when you fill it with fuel can you use a bottle of Lucas or Power service instead of fuel?
     
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  10. henboy1

    henboy1 Medium Load Member

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    Sorry , I would never do what he said unless your timing is right . I ain't no mech but I have been changing filters for 10yrs . If your timing ain't right and you get air sucked in , that truck will cut off . Already , it will act as tho it wants to cut off with the top off and it running .A bunch of starting fluid might wake it up . I just fill it to the max . 500 miles later it comes down to normal level
     
  11. jamespmack

    jamespmack Road Train Member

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    I only use clean fuel. I save the power service for cold/or freeze up.
     
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