Fleetguard · HF Hydraulic · inline line
HF6171 filter element: specifications & equivalents
The HF6171 is a Fleetguard inline-line hydraulic filter element, sized 114.5 × 323.85 mm OD × length, rated at 25 µm absolute (25 µm at β75(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 114.5 × 323.85 mm
Filtration rating 25 µm abs.
Beta rating 25 µm at β75(c) per ISO 16889
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 |
| Filtration rating | 25 µm |
| Rating basis | absolute |
| Beta ratio | 25 µm at β75(c) per ISO 16889 |
| Outside diameter OD | 114.5 mm |
| Length | 323.85 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6171 |
| 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.
Dimensions & series range
| Outside diameter | 114.5 mm (4.508 in) |
| Overall length | 323.85 mm (12.750 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1823 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 25012644 page in verification queue | UFI | partial | Fleetguard's online catalog lists 25012644 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3I1410 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3I1410 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 51823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 51823 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 551823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 551823 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 669434 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 669434 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 70669434 page in verification queue | UFI | partial | Fleetguard's online catalog lists 70669434 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 70676022 page in verification queue | UFI | partial | Fleetguard's online catalog lists 70676022 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85823 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92823 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C7047 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C7047 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CE1190H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CE1190H as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FA5057 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FA5057 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FA673 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FA673 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FF528 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FF528 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H64550 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H64550 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0617100 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0617100 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0617100JX page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0617100JX as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0617100MX page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0617100MX as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF896 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF896 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HFP559434 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HFP559434 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L622 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L622 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH4265 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LH4265 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ OP938 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists OP938 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P441320B page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P441320B as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P559434 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P559434 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PF1140 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PF1140 as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PL4550H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PL4550H as an interchange for HF6171. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT571 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT571 as an interchange for HF6171. 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 HF6171 model number is decoded
- HF6171Fleetguard HF-series hydraulic cartridge element part number.
- 323.85 mmOverall height.
- 114.5 mmLargest outside diameter.
- 25 µm at β75(c) per ISO 16889Published efficiency ratings.
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 are the dimensions of the HF6171 filter element?
The published envelope is 114.5 mm OD × 323.85 mm length (4.508 × 12.750 in). Confirm against the housing drawing before ordering.
What micron rating does HF6171 use?
This element is rated 25 µm absolute — 25 µm at β75(c) per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the HF6171 filter element?
29 partial match(es) requiring parameter review
How do I read the HF6171 part number?
See the designation decoder above: each segment of HF6171 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.