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HomeProductsFuel FiltersFJ-FS1098
FS1098 Fuel Water Separator for Cummins B6.7 ISB6.7 ISL8.9 L9
FJ-FS1098

FS1098 Fuel Water Separator for Cummins B6.7 ISB6.7 ISL8.9 L9

Fuel FiltersCE / ISO 9001

The FS1098 is a spin-on fuel/water separator for the Cummins B6.7, ISB6.7, QSB6.7, ISL8.9 and L9 diesels used in trucks, buses and off-highway machines. It threads onto the FH21462 filter head and drops free water out of the diesel before it reaches the high-pressure pump, replacing 5319680 and 5308722. Fill it with clean fuel before it goes on.

$18.99/ unit · referenceMOQ：1 units
Qty
min 1 units

📋 Key Specs

SKUFJ-FS1098
Part numberFS1098
Replaces5319680, 5308722
Filter headElement for the FH21462 head
Equivalent numbersBF46160-SPS, LFF1098, WF10716
TypeSpin-on fuel/water separator, metal body
Body outside diameter120 mm (4.72 in)
Box dimensions9.25 x 4.78 x 4.75 in
FuelDiesel, high-pressure common-rail systems
Fits enginesCummins B6.7, ISB6.7, QSB6.7, ISL8.9, L9
Vehicle typeBus, truck, off-highway machine
Before fittingFill the separator with clean fuel; never start the engine on a dry filter
Warranty90 days against manufacturing defects

❓ FAQ

A spin-on fuel/water separator for the Cummins B6.7, ISB6.7, QSB6.7, ISL8.9 and L9 diesels. It threads onto the FH21462 filter head, separates free water out of the diesel and holds particulate before the high-pressure pump.

5319680 and 5308722, and it is the element for the FH21462 head. Equivalent numbers in other brands are BF46160-SPS, LFF1098 and WF10716. Compare the number on the old can before ordering.

Both. Free water that condenses in the tank or arrives with the fuel settles out in the separator instead of travelling to the pump, and the media holds rust, dirt and tank scale at the same time.

Because the high-pressure pump on a common-rail engine is lubricated by the fuel itself. A can fitted dry means the pump runs without a diesel film for the first seconds after the engine catches, and that is where scoring starts.

Follow the interval in the vehicle or machine manual. Drain the water trap on the schedule the manufacturer sets rather than waiting for the warning light, and if the light stays on after a drain the separator is working and needs draining again.

MOQ varies by product: 5–100 units for standard parts (see product page). Tier pricing decreases with volume. Custom parts usually ≥ 50 units, evaluated by process.

Stock/short-run: 7–15 days; bulk orders 20–35 days; custom 30–45 days incl. sampling. Note your deadline in the inquiry — sales will confirm capacity.

Add products to the inquiry list and submit with contact info. Sales contact you within 24h and issue a formal quotation (tier pricing + proforma invoice) within 48h. The AI assistant can pre-fill inquiries in chat.

Yes. We develop from drawings/samples and support private labeling. Process: evaluation → sampling (15–25 days) → approval → mass production.

Payment: T/T 30% deposit + 70% before shipment / L/C / Trade Assurance. Shipping: FOB Ningbo/Shanghai, CIF or DDP; EU & NA warehouses; sea/air/express.

ISO 9001 & IATF 16949; CE/UL/ATEX on key products. Every batch ships with inspection reports; third-party inspection (SGS/BV) supported.

Description

Product Overview

The FS1098 is a spin-on fuel/water separator for the Cummins B6.7, ISB6.7, QSB6.7, ISL8.9 and L9 diesels that sit in medium-duty trucks, school and transit buses, and off-highway machines. It threads onto the FH21462 filter head, so the housing stays on the engine and only the can is changed at service.

It combines two jobs that a fuel filter on these engines has to do at once. The first is water: diesel carries free water from condensation in the tank and from the fuel supply itself, and that water separates out in the separator and drops to the bottom instead of travelling on. The second is particulate: rust, dirt and tank scale are held in the media before they reach the high-pressure pump and the injectors.

It replaces 5319680 and 5308722 and is the element for the FH21462 head. Fill it with clean fuel through the outer holes before it goes on — on a common-rail engine the high-pressure pump is lubricated by the fuel itself, and a can fitted dry means the pump runs without a film of diesel for the first seconds after the engine catches.

Key Features

Spin-on fitment — threads onto the existing FH21462 head, so the filter housing and its water sensor stay on the machine and only the can is replaced.
Separates free water from diesel — water that condenses in the tank or arrives in the fuel drops out in the separator rather than being pushed through the pump and the injectors.
Holds particulate ahead of the pump — rust, dirt and tank scale are trapped in the media before the high-pressure pump, which is where a scored plunger turns into an expensive repair.
Metal body — a steel can that takes the pressure of the fuel system and the vibration of an engine on a truck chassis or a machine frame.
Four cross-references — 5319680, 5308722, and the equivalent numbers BF46160-SPS, LFF1098 and WF10716, so the old can can be matched before anything is loosened.
Element for the FH21462 head — the same housing used across the B6.7 and L9 families, which is why one can covers several engine ratings.
Fill before fitting — the can is primed with clean fuel through the outer holes, so the pump is not dry at the first crank after a service.
Bus and truck duty — specified for vehicles that run long days at steady load, where fuel quality varies with every fill and water is the constant risk.
Service item, not a repair — a separator costs a fraction of the pump and injectors it protects, and it is the cheaper half of the two to replace.
One can, one box — supplied on its own, so a service does not need a kit or a second part number.

Cross-Reference

Primary number — FS1098
Cummins — 5319680, 5308722
Baldwin / Luber-finer / WIX — BF46160-SPS, LFF1098, WF10716
Filter head — element for the FH21462 head
Checking the number — read the number off the old can before ordering; the numbers above are what this separator replaces.

Specifications

Type — Spin-on fuel/water separator, metal body
Body outside diameter — 120 mm (4.72 in)
Box dimensions — 9.25 x 4.78 x 4.75 in
Fuel — Diesel, high-pressure common-rail systems
Filter head — FH21462
Service interval — Follow the interval in the machine or vehicle manual, and drain the water trap at the interval the manufacturer sets rather than waiting for the warning light

Application

Engine family — Cummins B6.7, ISB6.7, QSB6.7, ISL8.9, L9
Vehicle type — Bus, truck, off-highway machine
Before fitting — Fill the can with clean fuel through the outer holes; a dry filter means a dry pump at the first start
After fitting — Run the engine, check the seal at the head for seepage, and drain any water from the trap before the vehicle goes back into service
Water warning light — If the water-in-fuel lamp stays on after a drain, the separator is doing its job and the trap needs draining again; do not ignore it until the lamp resets on its own
Warranty — 90 days against manufacturing defects
Batch inspection — Every batch is checked for thread form, seal seat and can dimensions before packing
Quality system — Manufactured under ISO 9001 and IATF 16949 quality management

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