Fleetguard · HF Hydraulic · inline line
HF6391 filter element: specifications & equivalents
The HF6391 is a Fleetguard inline-line hydraulic filter element. Verify against the current manufacturer data sheet before ordering.
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic
catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.
Specifications and cross-references are taken from the Fleetguard online catalog API. Where both TWA and Beta ratings are published the conventions differ — verify cleanliness targets, collapse rating and seal configuration against the current Fleetguard data sheet before ordering.
Specification table
| Parameter | Value |
|---|---|
| Filter type | inline line |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6391 |
| Source catalog | Cummins Filtration / Fleetguard: Fleetguard online product catalog (fleetguard.com) |
| Last verified | 2026-09-28 |
Sources: Cummins Filtration / Fleetguard — Fleetguard online product catalog (fleetguard.com) — accessed 2026-09-28.
Fleetguard® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Fleetguard distributor.
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 28055E page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 28055E as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3031520 page in verification queue | UFI | partial | Fleetguard's online catalog lists 3031520 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 325978 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 325978 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4898 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 4898 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 572620 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 572620 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 813ACC10CB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 813ACC10CB as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AN62362 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AN62362 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C1602PL4 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C1602PL4 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0639100 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0639100 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P567460 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P567460 as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P600410SX page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P600410SX as an interchange for HF6391. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
Interchange levels: full catalog-confirmed drop-in · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the HF6391 model number is decoded
- HF6391Fleetguard HF-series hydraulic cartridge element part number.
Typical equipment & applications
- Construction, agricultural and industrial hydraulic circuits
- Mobile-equipment hydraulic return and pressure lines
Selection pitfalls — read before you substitute
- “10 µm nominal” and “12 µm at β1000” can describe the very same media — one is reported at β≥200, the other at β≥1000 per ISO 16889. Compare ratings at the same Beta test point, not just the printed micron number.
- Nitrile (NBR) seals are standard for mineral hydraulic oil but fail early in some phosphate-ester fluids and at sustained high temperature; verify seal compound against the fluid data sheet (fluorocarbon/Viton executions may be required).
- End-cap geometry and the number/position of O-rings block interchange even when OD and length match — visually compare end caps before fitting, especially with aftermarket cartridges.
Frequently asked questions
What replaces the HF6391 filter element?
11 partial match(es) requiring parameter review
How do I read the HF6391 part number?
See the designation decoder above: each segment of HF6391 encodes size, line type, filtration grade and media/collapse execution.
Is a same-envelope aftermarket element always a drop-in replacement?
No. Matching OD and length only proves the cartridge fits the bowl. End-cap style, seal compound, micron/Beta rating, collapse pressure and bypass configuration must also match; the table above tags every equivalent as full, partial or verify for exactly this reason.
How often should a hydraulic return-line element be replaced?
Replace at the housing manufacturer’s recommended differential-pressure setting (commonly signalled by a clogging indicator), or on a time-based service interval when no indicator is fitted — never wait for bypass to open continuously, because unfiltered oil then reaches the valves.
Other models in the HF Hydraulic series
All 2621 →Reviewed & verified by the ElementRef engineering desk against Cummins Filtration / Fleetguard on 2026-09-28. Read our editorial & correction policy.