Fuel Filters on our 450DA Caterpillar 3126's

Discussion in 'Sport Yachts/Yachts' started by DjDaoust, May 5, 2016.

  1. DjDaoust

    DjDaoust Member

    212
    Nov 4, 2015
    La Crosse, WI
    1998 450 Sundancer - 3 Boys & A Blonde
    Cat 3126's
    Any tips on swapping out the fuel filters on our 3126's this weekend? Replacing with the Cat brand filters.
     
  2. Boat Guy

    Boat Guy Well-Known Member

    What is going to be your procedure?
     
  3. carterchapman

    carterchapman Well-Known Member TECHNICAL Contributor SILVER Sponsor

    Mar 25, 2008
    Lake Chickamauga/Marietta, GA/Ft. Myers, FL
    2006 Sea Ray 58 DB
    MAN CRM V8-900s, Twin Disc Drives; Onan 21.5 Generator
    DJ,

    I open up a "poo pad" and spread it under the filter, turn off my fuel valves, and unscrew the filter - keep a plastic container handy to put the old filter in. Prefill the new filter with clean diesel, and screw it on. Open the fuel valve and start it up. Check for leaks after start.
     
  4. DjDaoust

    DjDaoust Member

    212
    Nov 4, 2015
    La Crosse, WI
    1998 450 Sundancer - 3 Boys & A Blonde
    Cat 3126's
    Thanks Carter!
     
  5. ttmott

    ttmott PhD in OCD TECHNICAL Contributor GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Same procedure for oil filters. Turn off fuel at tank; ER this is not applicable for oil. Loosen filter then hold bucket over it and thread off into bucket. Wipe filter mount sealing surface clean. Fill new filter with clean fuel and wipe some fuel on the gasket and thread on.
     
  6. carterchapman

    carterchapman Well-Known Member TECHNICAL Contributor SILVER Sponsor

    Mar 25, 2008
    Lake Chickamauga/Marietta, GA/Ft. Myers, FL
    2006 Sea Ray 58 DB
    MAN CRM V8-900s, Twin Disc Drives; Onan 21.5 Generator
    I've found that if I wait 15 minutes after I've pumped out the oil from the engines, I can remove the oil filters without a drop of oil spilling...
     
  7. Turtlesboat

    Turtlesboat Minister of Media TECHNICAL Contributor

    Feb 4, 2007
    New York City
    1996 450DA, TNT, Caribe dink w/15hp OB.
    3126 427HP TD transmissions
    there's little pumps next to the filters. you have to unscrew the pump head and then pump fuel into the filter until it's full.
     
  8. ttmott

    ttmott PhD in OCD TECHNICAL Contributor GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Yea with five hundred strokes and don't forget to turn the little valve 90 degrees. Those pumps are a fuel leaking PITA. I think it best to fill the filter then install. Advance the throttle fully which will set high demand on the rack and crank it up backing the throttle out when she fires up. It'll stumble a bit but recover in short order. Simple and works. Same when changing the Racors.....
     

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