Fleetguard · HF Hydraulic · inline line
HF35278 filter element: specifications & equivalents
The HF35278 is a Fleetguard inline-line hydraulic filter element, rated at 40 µm absolute (40 µm at β75(c); 42 µm at β200(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Inside diameter 111.51 mm
Filtration rating 40 µm abs.
Beta rating 40 µm at β75(c); 42 µm at β200(c) per ISO 16889
Collapse / burst 3.45 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 | 40 µm |
| Rating basis | absolute |
| Beta ratio | 40 µm at β75(c); 42 µm at β200(c) per ISO 16889 |
| Inside diameter ID | 111.51 mm |
| Length | 203.2 mm |
| End caps | open-ended cartridge element |
| Collapse / burst pressure | 3.45 bar |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF35278 |
| 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 |
|---|---|---|---|
|
↔ 1051399M91 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1051399M91 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1051399M92 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1051399M92 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 136601 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 136601 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1531 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1531 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 35290295 page in verification queue | UFI | partial | Fleetguard's online catalog lists 35290295 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 35328509 page in verification queue | UFI | partial | Fleetguard's online catalog lists 35328509 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3I0449 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3I0449 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51531 | WIX Filters | partial | Fleetguard's online catalog lists 51531 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 551531 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 551531 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85531 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85531 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 914622 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 914622 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92531 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92531 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ARH160108 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ARH160108 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C6999 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C6999 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CH6650 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CH6650 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ D136601 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists D136601 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ D136607 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists D136607 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L409 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L409 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LF217 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LF217 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LP2318 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LP2318 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P160108 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P160108 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P160180 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P160180 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P560527 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P560527 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P740 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P740 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PF997 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PF997 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT760 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT760 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT76025 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT76025 as an interchange for HF35278. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH56332 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH56332 as an interchange for HF35278. 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 HF35278 model number is decoded
- HF35278Fleetguard HF-series hydraulic cartridge element part number.
- 203.2 mmOverall height.
- 111.51 mmLargest end inside diameter.
- 40 µm at β75(c); 42 µm at β200(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 micron rating does HF35278 use?
This element is rated 40 µm absolute — 40 µm at β75(c); 42 µm at β200(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 HF35278 filter element?
28 partial match(es) requiring parameter review
How do I read the HF35278 part number?
See the designation decoder above: each segment of HF35278 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.