FS1003 Fuel Water Separator Apply to Cummins Engine

FS1003 Fuel Water Separator Specifications

✅ Primary Applications

• Compatible Cummins Engines:

  • ISB 5.9L (2003-2007)

  • ISB 6.7L (2007-2018)

  • ISC 8.3L

  • QSB (Industrial/Marine variants)

• Common Equipment:

  • Dodge Ram 2500/3500 (2003-2018)

  • School buses

  • Construction equipment

  • Marine auxiliary engines

🔧 Technical Specifications

🔄 Cross-Reference Numbers

• Fleetguard (OEM): FS1003

• Baldwin: BF7531

• Donaldson: P551300

• WIX: 33423

• Luber-finer: LFF3503

⚠️ Critical Notes

1. Year Limitations:

   • For 2019+ Cummins engines, use FS1004NN (with different bypass valve)

2. Water Sensor:

   • Compatible with standard WIF sensors

   • Marine versions require brass sensor (PN# 4084183)

3. Service Intervals:

   • Normal: 15,000 miles

   • Severe: 7,500 miles (or 3 months with biodiesel)

🛠️ Installation & Maintenance

1. Replacement Procedure:

   • Always replace O-ring (included)

   • Hand-tighten + 1/2 turn (do not overtighten)

   • Prime system after replacement

2. Water Draining:

   • Weekly in humid climates

   • Immediately when WIF light activates

❌ Common Failure Modes

• Clogging: From algae growth in biodiesel

• Bypass Valve Failure: Causes unfiltered fuel flow

• Gasket Leaks: From improper installation

🆚 Comparison to FS1002

• 30% larger water collection capacity

• Improved cellulose/synthetic media blend

• Backward compatible for most applications

Maintenance Tip: For biodiesel users, consider FS1003B (special anti-algae formulation) with 5,000-mile service intervals.