Fleetguard4 Matches
FS19596
Thread1-14 UNS
Gasket OD93.5 mm (3.68 in)
Height209 mm (8.23 in)
Bypass Relief15 PSI (1.03 bar)
Fuel Filter Cross-Reference Matrix
Primary and secondary fuel filters, diesel water separators, and high-pressure fuel strainers.
Verified Fuel Filter Part References (1)
Technical Reference Standard
Fuel & Water Separator Cross-Reference Guide
Primary vs secondary diesel filtration, water-in-fuel (WIF) sensor ports, and micron stages.
1
Primary (10-30 Micron) vs Secondary (2-5 Micron)
Primary suction-side filters strip water droplets and coarse particulate. Secondary pressure-side filters protect high-pressure common rail (HPCR) fuel injectors operating at 30,000+ PSI from microscopic wear.
2
Hydrostatic Water Separation Media
Hydrophobic cellulose and silicone-treated meltblown media cause water droplets to coalesce and drop into a lower collection bowl before reaching the injection pump.
3
WIF Sensor Port Threading
Replacement fuel filters must match the bottom bowl sensor thread (commonly 1/2-20 UNF or M14x2.0) to ensure the vehicle dashboard water indicator functions properly.
4
Flow Rate & Micron Restriction
Diesel engines require high fuel recirculation rates. Undersized replacement elements create fuel starvation, injector cavitation, and loss of power under load.
Frequently Asked Questions
Fuel Filter Interchange FAQ
Can I replace a 2-micron secondary filter with a 10-micron element?
Never. Modern common rail diesel injectors require 2 to 5 micron filtration. Installing a 10-micron element will lead to accelerated injector nozzle wear and premature failure.
How do I identify whether a filter is primary or secondary?
Primary filters are mounted before the lift pump (suction side) and typically feature 10-30 micron media with a water drain valve. Secondary filters are mounted after the pump with 2-5 micron ratings.
Do replacement fuel filters include the lower drain bowl and sensor?
Most replacement spin-on filters are spin-on cartridges designed to reuse the existing OEM clear collection bowl and WIF sensor.
How often should fuel/water separators be drained?
The water collection bowl should be visually inspected weekly and drained whenever water accumulation is visible or the WIF dashboard light illuminates.
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