FS36401 Fuel Water Separator Cartridge, Replacement for Fleetguard FS36401 and PACCAR K37-1004
FS36401 fuel water separator cartridge, 193.5 mm length. Replaces PACCAR K37-1004, Baldwin PF9928, Donaldson P557004, WIX WF10249. Factory-direct.
Description
The FS36401 fuel water separator is a cartridge-style fuel and water separator element for PACCAR MX-13 and Cummins ISX engines, used in Kenworth and Peterbilt trucks. IXIN Filter manufactures this FS36401 fuel water separator as a factory-direct replacement for the Fleetguard FS36401 and PACCAR K37-1004, giving distributors, fleets and repair shops a dependable option for scheduled fuel filter replacement.
IXIN has produced filters since 2010 and supplies customers in more than 60 countries. Browse our full range of fuel filters for trucks, buses, construction and agricultural machinery.
FS36401 Fuel Water Separator Specifications
| Attribute | Detail |
|---|---|
| Product Type | Fuel / Water Separator Cartridge Element |
| Overall Length | 193.5 mm (7.62 in) |
| Largest Outside Diameter | 105.7 mm (4.16 in) |
| Replaces | Fleetguard FS36401 / PACCAR K37-1004 |
End inside diameter and gasket details are available on request. Please send us your drawing or sample for confirmation before ordering in bulk.
Housing and Application Notes
The FS36401 is a cartridge element, not a complete spin-on filter. It is used inside a compatible filter housing, so the housing on your truck decides whether it fits. Cross-reference data lists it for:
- PACCAR MX-13 engines
- Cummins ISX engines
- Peterbilt and Kenworth trucks with 2010-emission engines
Later model year trucks (2017 and newer) may use updated filter part numbers. Fit depends on the engine, housing and model year, so send us the OE number from your old element if you are not sure.
FS36401 Cross Reference / Replacement Numbers
The FS36401 fuel water separator is a cross reference to the following part numbers:
| Brand / Source | Part Number |
|---|---|
| Fleetguard | FS36401 |
| PACCAR | K37-1004 (K371004) / K371005 |
| Baldwin | PF9928 |
| Donaldson | P557004 |
| WIX | WF10249 |
| NAPA | 600249 |
| Luber-finer | L5094F |
OE and aftermarket part numbers are listed for reference only. All brand names belong to their respective owners, and IXIN is not affiliated with them. Always confirm fit against your housing and engine before ordering.
Why a Fuel Water Separator Matters
Water and dirt in diesel fuel can damage injectors and high-pressure fuel pumps. A fuel water separator removes free water and fine contaminants before the fuel reaches the engine. Regular replacement helps prevent hard starting, power loss and costly injector repairs, especially on long-haul trucks that refuel from different sources.
Why Choose IXIN’s FS36401 Fuel Water Separator
- Factory-Direct Supply: IXIN manufactures filters in its own factory in Linxi County, Hebei. You deal with the manufacturer, not a trading company.
- Wide Cross-Brand Coverage: One FS36401 fuel water separator replaces PACCAR, Baldwin, Donaldson and WIX references, which helps distributors simplify inventory.
- Cartridge Design: Replacing only the cartridge keeps service simple, and the housing can stay on the truck.
- Customization Available: We support customization of filter paper quality, metal thickness and packaging for your market.
- Fast Delivery: In-stock items usually ship in 5 to 10 days. Made-to-order items take 15 to 45 days, depending on quantity.
To avoid cross-reference mistakes, read our fuel filter cross reference guide before placing a bulk order.
Installation and Maintenance Notes
- Switch off the engine and let it cool. Close the fuel shutoff valve if fitted.
- Place a drain pan under the housing, and drain the water from the separator if a drain is fitted.
- Open the housing according to the manufacturer’s instructions, and remove the old cartridge element.
- Clean the inside of the housing and check the gasket and seals. Replace worn seals.
- Install the new FS36401 fuel water separator cartridge, making sure it seats correctly in the housing.
- Close the housing and prime the fuel system according to the engine manual.
- Start the engine, check for leaks, and replace the filter at the interval recommended by the engine maker. Replace sooner when using poor-quality fuel.
FAQ
Q: Which part numbers does the FS36401 fuel water separator replace?
A: It is a cross reference to Fleetguard FS36401, PACCAR K37-1004, Baldwin PF9928, Donaldson P557004, WIX WF10249 and others listed above. Confirm fit before bulk orders.
Q: Is the FS36401 the same as the FS20172?
A: No. They are similar in size, but they are separate part numbers for different engine generations. The FS36401 crosses to PACCAR K37-1004, while the FS20172 crosses to PACCAR K37-1011. Check the OE number on your old element before ordering.
Q: Is the FS36401 a complete filter or a cartridge?
A: It is a cartridge element. It must be used inside a compatible housing, so check your housing and OE number before ordering.
Q: Which trucks and engines does the FS36401 fit?
A: It is listed for PACCAR MX-13 and Cummins ISX engines in Kenworth and Peterbilt trucks with 2010-emission engines. Fit depends on the housing and model year, so send us your OE number, truck model or a photo of the old element, and we will help confirm.
Q: Can I order with custom packaging or private label?
A: We support customized packaging, filter paper quality and metal thickness. Contact our sales team with your requirements.
Q: What are the MOQ and lead time?
A: In-stock goods generally ship in 5 to 10 days, and made-to-order items take 15 to 45 days. Get in touch with us for MOQ on the FS36401 fuel water separator.
Need the FS36401 fuel water separator or other heavy-duty fuel filters? Send us the OE number, and we will reply with specifications and a quotation.
Email: sales@ixinfilters.com | WhatsApp: +86 18833443345 | Get a quote
