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Davco  |  SKU: 03-45581-009

03-45581-009 | Genuine Davco® Fuel Water Separator Fuel Pro® 485

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Description:
A fuel water separator 03-45581-009 is a device used in fuel systems (especially diesel engines) to remove water and contaminants from fuel before it reaches the engine. Fuel Water Separator Fuel Pro® 485 For Freightliner Cascadia, Western Star 5700XE, International LT Series, Kenworth T680, Peterbilt 579, other trucks with DAVCO Fuel Pro 485 fuel/water separator system

Part Number: 03-45581-009, 0345581009
Condition: New
Manufacture/Brand: Davco

Specifications:

Height, Overall, Unheated Model 15.54 in. (394.8 mm)
Depth, Overall 10.34 in. (262.63 mm)
Width, Maximum 11.62 in. (295.14 mm)
Minimum Service Height 5.5 in. (139.7 mm)
Max Fuel Flow 180 gph
Pre‑heater 12VDC (155W or 195W)
or 24VDC (195W)
Overnight heater 120VAC, 75W, .65A
Fuel In M22 x 15-6H
Fuel Out M22 x 15-6H



Fits 03-45581-009 For 

Freightliner Cascadia, Western Star 5700XE, International LT Series, Kenworth T680, Peterbilt 579 Other Trucks with DAVCO Fuel Pro 485 fuel/water separator system


Purpose of using 03-45581-009:

  • Remove water from fuel – Water settles out and is separated so it doesn’t enter the engine.
  • Protect fuel system components – Prevents damage to injectors, fuel pumps, and fuel lines.
  • Improve engine reliability – Clean, dry fuel helps the engine run smoothly and start more easily.
  • Prevent corrosion – Water in fuel can rust and corrode metal parts inside the fuel system.
  • Improve fuel efficiency and combustion – Cleaner fuel burns better and more completely.

 

Signs of a Bad Fuel Water Separator 03-45581-009:

 
  • Loss of engine power – The engine may feel weak or slow to accelerate due to restricted fuel flow.
  • Hard starting or no start – Water or clogged filtration can prevent proper fuel delivery.
  • Engine stalling – The engine may shut off unexpectedly, especially under load.
  • Rough idle or misfiring – Contaminated fuel can cause uneven combustion.
  • Check Engine Light – The ECU may detect fuel pressure or injector issues.
  • Poor fuel economy – The engine works harder when fuel flow is restricted or dirty.
  • Water warning light (if equipped) – Many diesel systems have a sensor that alerts when water builds up in the separator.
  • Visible water or sludge in the bowl – In clear bowl-type separators, you may see excessive water or contamination.


About the Manufacturer – Davco:

DAVCO is a leading manufacturer of innovative fuel filtration and maintenance solutions for the commercial transportation industry. Known for its commitment to quality, reliability, and performance, DAVCO designs advanced fuel filter systems that help protect diesel engines from contaminants, improve fuel efficiency, and reduce maintenance costs. Trusted by fleet operators, truck manufacturers, and service professionals worldwide, DAVCO products are engineered to maximize engine performance, extend component life, and minimize vehicle downtime. With decades of industry experience, DAVCO continues to deliver cutting-edge filtration technology that supports the demanding needs of heavy-duty trucks, buses, construction equipment, and other diesel-powered applications.

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