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Fuel Water Separator Needed on Cummins ISX?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by tallmon, Dec 18, 2015.

  1. Dec 18, 2015 #1
    tallmon

    tallmon Medium Load Member

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    So my 2007 KW T6 with Cummins ISX was originally spec'd with two fuel filters. Donaldson P552200 and P552203 (this is what the dealer tells me based on the VIN). I just noticed that the shop that's been doing my PM's for the last couple of years has been putting on a P552200 and a P551000. The second one is a fuel water separator.

    Is this a problem? What are the pros/cons to running with or without a water separator?
     
    tallmon, Dec 18, 2015
    tallmon, Dec 18, 2015
    #1
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  3. Dec 18, 2015 #2
    mountaingote

    mountaingote Road Train Member

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    I would never run without one. There is no downside to not having water in fuel
     
    mountaingote, Dec 18, 2015
    mountaingote, Dec 18, 2015
    #2
  4. Dec 19, 2015 #3
    tony97905

    tony97905 Road Train Member

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    I noticed Paccar specing those exact filters and had more than one discussion with owners where the water goes. Having worked for CAT and Cummins I can assure you OEM's don't follow engine manufacturers recommendations to the letter. I would go to Fleetguard's site and check out filtration and flow specs and make your decision based on facts.
     
    tony97905, Dec 19, 2015
    tony97905, Dec 19, 2015
    #3
  5. Dec 19, 2015 #4
    tallmon

    tallmon Medium Load Member

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    So are you recommending to go with the separator?
     
    tallmon, Dec 19, 2015
    tallmon, Dec 19, 2015
    #4
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