Fleetguard · HF Hydraulic · inline line
HF35451 filter element: specifications & equivalents
The HF35451 is a Fleetguard inline-line hydraulic filter element, built with cellulose media, sized 129 × 178.1 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 129 × 178.1 mm
Filtration rating 25 µm abs.
Beta rating 25 µm at β75(c) per ISO 16889
Media Cellulose
Collapse / burst 4.827 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 |
| Media | Cellulose |
| Filtration rating | 25 µm |
| Rating basis | absolute |
| Beta ratio | 25 µm at β75(c) per ISO 16889 |
| Outside diameter OD | 129 mm |
| Length | 178.1 mm |
| End caps | open-ended cartridge element |
| Rated flow | 208 L/min |
| Collapse / burst pressure | 4.827 bar |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF35451 |
| 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 | 129 mm (5.079 in) |
| Overall length | 178.1 mm (7.012 in) |
All 129×178 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1046931 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1046931 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1204 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1204 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1535208 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1535208 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1R0735 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1R0735 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1R0736 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1R0736 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1R0777 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1R0777 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3621298M1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3621298M1 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4T0522 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 4T0522 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4T0523 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 4T0523 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4T522 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 4T522 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 51204 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 51204 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 5839HF6376 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 5839HF6376 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85204 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85204 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92204 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92204 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ALH16005 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ALH16005 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AS1071H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AS1071H as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C7063 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C7063 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CE1184H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CE1184H as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ EY885H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists EY885H as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FH1055 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FH1055 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H5510 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H5510 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HD1361 | MANN-FILTER | partial | MANN-FILTER's online catalog lists HF35451 (FLEETGUARD/CUMMINS FILTRATION) as a comparison number for HD1361. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HD1361 | MANN-FILTER | partial | Fleetguard's online catalog lists HD1361 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF793 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF793 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY9592 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HY9592 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L689 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L689 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH4932 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LH4932 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P163977 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P163977 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550523 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550523 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550525 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550525 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550921 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550921 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P551096 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P551096 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P573995 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P573995 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P793 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P793 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PF2220 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PF2220 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT91 | Baldwin Filters | partial | Fleetguard's online catalog lists PT91 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RF19050 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RF19050 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH56426 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH56426 as an interchange for HF35451. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WGH6376 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists WGH6376 as an interchange for HF35451. 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 HF35451 model number is decoded
- HF35451Fleetguard HF-series hydraulic cartridge element part number.
- 178.1 mmOverall height.
- 129 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 HF35451 filter element?
The published envelope is 129 mm OD × 178.1 mm length (5.079 × 7.012 in). Confirm against the housing drawing before ordering.
What micron rating does HF35451 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 HF35451 filter element?
39 partial match(es) requiring parameter review
How do I read the HF35451 part number?
See the designation decoder above: each segment of HF35451 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.
Same-envelope elements from other brands
View full interchange →These 2 catalog element(s) share the 129×178 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.
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.