Fleetguard · HF Hydraulic · inline line
HF6278 filter element: specifications & equivalents
The HF6278 is a Fleetguard inline-line hydraulic filter element, sized 55 × 116 mm OD × length (ID 13 mm), rated at 22 µm absolute (22 µm at β75(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 55 × 116 mm
Inside diameter 13 mm
Filtration rating 22 µm abs.
Beta rating 22 µm at β75(c) per ISO 16889
Collapse / burst 10 bar
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 | 22 µm |
| Rating basis | absolute |
| Beta ratio | 22 µm at β75(c) per ISO 16889 |
| Outside diameter OD | 55 mm |
| Inside diameter ID | 13 mm |
| Length | 116 mm |
| End caps | open-ended cartridge element |
| Rated flow | 14 L/min |
| Collapse / burst pressure | 10 bar |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6278 |
| 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 | 55 mm (2.165 in) |
| Inside diameter | 13 mm (0.512 in) |
| Overall length | 116 mm (4.567 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 0832934 page in verification queue | UFI | partial | Fleetguard's online catalog lists 0832934 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1397470718 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1397470718 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1457429649 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1457429649 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1500686 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1500686 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1503662 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1503662 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 15036627 page in verification queue | UFI | partial | Fleetguard's online catalog lists 15036627 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1534564 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1534564 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1585618 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1585618 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 15856180 page in verification queue | UFI | partial | Fleetguard's online catalog lists 15856180 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1585681 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1585681 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1907641 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1907641 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2553500 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2553500 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2553520 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2553520 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 314405M1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 314405M1 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3144405M1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3144405M1 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 397470718 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 397470718 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7633141110 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 7633141110 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 76686 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 76686 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 832934 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 832934 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C9231 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C9231 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ DH6150 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists DH6150 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ EY1039H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists EY1039H as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ F281950030010 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists F281950030010 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H615 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H615 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H71220 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H71220 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0627800 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0627800 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0627800JX page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0627800JX as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ OM5121 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists OM5121 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550360 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550360 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT9131 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT9131 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH56328 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH56328 as an interchange for HF6278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ X281950030010 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists X281950030010 as an interchange for HF6278. 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 HF6278 model number is decoded
- HF6278Fleetguard HF-series hydraulic cartridge element part number.
- 116 mmOverall height.
- 55 mmLargest outside diameter.
- 13 mmLargest end inside diameter.
- 22 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 HF6278 filter element?
The published envelope is 55 mm OD × 116 mm length with a 13 mm inside diameter (2.165 × 4.567 in × 0.512 in ID). Confirm against the housing drawing before ordering.
What micron rating does HF6278 use?
This element is rated 22 µm absolute — 22 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 HF6278 filter element?
32 partial match(es) requiring parameter review
How do I read the HF6278 part number?
See the designation decoder above: each segment of HF6278 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.