Description
The Fleetguard FS36401 is a StrataPore-media fuel/water separator that ships as the direct OE replacement for Paccar K37-1004 and Kenworth K371004 on Peterbilt and Kenworth trucks. It is the current-revision upgrade to Fleetguard FS20075, and crosses to Donaldson P557004, Baldwin PF9928, Wix WF10249, and Luberfiner L5094F.
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | FS36401 |
| Part Type | Fuel/Water Separator (Spin-On) |
| Length | 7.62 in |
| Largest OD | 4.16 in |
| Media Type | StrataPore |
| Emulsified Water Separation | 0.5028 (per Fleetguard data) |
| BPV Opening DP | None |
| Replaces | Fleetguard FS20075 |
Cross References
This part replaces or is equivalent to the following part numbers:
- Paccar: K37-1004, K371004, K371005
- Kenworth: K371004
- Donaldson: P557004
- Baldwin: PF9928
- Wix: WF10249
- Luber-finer: L5094F
- NAPA: 600249
- Fleetguard (predecessor): FS20075
Applications
This fuel/water separator is the OE fit for Paccar fuel systems used in:
- Kenworth T660, T680, T800, T880, W900 (with Paccar fuel filter housing)
- Peterbilt 386, 389, 567, 579 (with Paccar fuel filter housing)
Verify your existing filter part number and housing configuration before ordering. Trucks with Cummins fuel systems use a different filter.









