Description
Product Overview
The iFJF PF9804 Fuel Water Separator Filter is a critical fuel system component for Detroit Diesel DD13, DD15, and DD16 engines powering Class 8 heavy-duty trucks. This filter removes both water and particulate contaminants from diesel fuel before it enters the high-pressure common rail injection system. Replaces FS19915WE and A0000903651. Manufactured to IATF 16949 quality standards for reliable performance in demanding commercial trucking applications.
Key Features
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Dual-Stage Filtration: Removes both emulsified water and solid particles from diesel fuel — protects injectors, pumps, and the entire fuel system.
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DD13/DD15/DD16 Coverage: Engineered specifically for Detroit Diesel heavy-duty engines used in Freightliner Cascadia, Western Star, and commercial truck platforms.
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High-Efficiency Water Separation: Specialized coalescing media separates microscopic water droplets from fuel, preventing injector tip erosion and microbial growth.
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Class 8 Truck Durability: Built for the extreme duty cycles of over-the-road trucking — high flow rates, extended service intervals, and vibration resistance.
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IATF 16949 Certified Manufacturing: Meets the same quality standards demanded by major OEM suppliers.
Engine Compatibility
| Engine |
Displacement |
Vehicle Applications |
| Detroit DD13 |
12.8L |
Freightliner Cascadia, M2 112, Western Star 4700 |
| Detroit DD15 |
14.8L |
Freightliner Cascadia, Western Star 4900/5700XE |
| Detroit DD16 |
15.6L |
Freightliner Cascadia, Western Star 4900/6900 |
Cross-Reference Numbers
| Manufacturer |
Part Number |
| iFJF / Aftermarket |
PF9804 |
| OEM Cross-Reference |
FS19915WE, A0000903651 |
Maintenance Interval
Replace every 25,000-30,000 miles or at every other oil change for highway trucks. Drain the water separator bowl weekly or when the water-in-fuel warning light illuminates on the dashboard. Neglecting water drainage can lead to injector damage and costly repairs.
Frequently Asked Questions
Q: Will this fit my 2019 Cascadia with DD15?
A: Yes. The PF9804 is the correct fuel water separator for all DD15 engines used in Freightliner Cascadia models.
Q: What's the difference between PF9804 and R61709?
A: Both are fuel water separators for DD13/DD15/DD16. Check your truck's filter housing part number to confirm the correct filter. These are often interchangeable in the same housing.
Q: How often should I drain the water separator?
A: Weekly or whenever the water-in-fuel dashboard warning light activates. Regular draining prevents water accumulation that can damage injectors.
Q: Does this filter remove water from diesel?
A: Yes. The specialized coalescing media separates both free and emulsified water from diesel fuel for complete fuel system protection.
Q: Can I change this filter myself?
A: Yes, fuel filter replacement is standard fleet maintenance. Fill the new filter with clean diesel before installation, then prime the system before starting.
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