The term "K37-1021" most commonly refers to a PACCAR fuel/water separator filter. This is a high-efficiency, 10-micron primary filter used in heavy-duty commercial trucks to protect modern high-pressure fuel injection systems from water and debris.
Engines: Compatible with Cummins ISX-15, ISX-12, X15, and PACCAR MX-13 engines.
Truck Models: Found frequently on Kenworth T680, T880, W900, and Peterbilt 567 and 579 models (typically model years 2013–2020).
Cross-Reference Numbers:
Fleetguard: FS20207
Baldwin: PF46236
Luber-finer: L5113F
Wix: WF10566
Donaldson: R6176XL10
The term "K37-1021" most commonly refers to a PACCAR fuel/water separator filter. This is a high-efficiency, 10-micron primary filter used in heavy-duty commercial trucks to protect modern high-pressure fuel injection systems from water and debris.
Engines: Compatible with Cummins ISX-15, ISX-12, X15, and PACCAR MX-13 engines.
Truck Models: Found frequently on Kenworth T680, T880, W900, and Peterbilt 567 and 579 models (typically model years 2013–2020).
Cross-Reference Numbers:
Fleetguard: FS20207
Baldwin: PF46236
Luber-finer: L5113F
Wix: WF10566
Donaldson: R6176XL10
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