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  1. axmans

    High fuel differential pressure Cat 3512b

    Hey Mike, Thanks for your great input....and yes, I am calling the Cat filters the primary filters because that is what most manufacturers call the Filters when looking up the parts in the manuals....but the first filters are the Racors. Not sure what the microns are of the Cat filters, but...
  2. axmans

    High fuel differential pressure Cat 3512b

    Thanks Mike, All the fuel goes through an Alfa Laval system before it then travels through 4 Racor 20micron's, after that it goes through 5 Primary Cat filters....nothing of note in the filters that i removed, that's why I think it is the sensor...
  3. axmans

    High fuel differential pressure Cat 3512b

    I am an engineer on a private motoryacht with 3512b's. Yesterday while underway, the ecu alarmed because of High differential fuel pressure. Alarm is set at 15psi, and the value went as high as 30psi, but was oscillating. when the captain increased rpm's to 1200, the pressure returned to normal...

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