Fleetguard · HF Hydraulic · return line
HF28951 filter element: specifications & equivalents
The HF28951 is a Fleetguard return-line hydraulic filter element, sized 99.36 × 189.2 mm OD × length. Verify against the current manufacturer data sheet before ordering.
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 | return line |
| Outside diameter OD | 99.36 mm |
| Length | 189.2 mm |
| End caps | spin-on baseplate with attached gasket |
| Flow direction | outside-in |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF28951 |
| 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 | 99.36 mm (3.912 in) |
| Overall length | 189.2 mm (7.449 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 675023288171 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 675023288171 as an interchange for HF28951. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FH1016 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FH1016 as an interchange for HF28951. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550479 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550479 as an interchange for HF28951. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH60278 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH60278 as an interchange for HF28951. 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 HF28951 model number is decoded
- HF28951Fleetguard HF-series hydraulic spin-on filter part number.
- 189.2 mmOverall height.
- 99.36 mmLargest outside diameter.
Typical equipment & applications
- Construction, agricultural and industrial hydraulic circuits
- Mobile-equipment hydraulic return and pressure lines
Selection pitfalls — read before you substitute
- A return-line element is not a pressure-line element: return cartridges (BN4HC low-collapse) tolerate roughly 20 bar differential, while BH4HC pressure executions are rated to 210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
- This element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
- “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 HF28951 filter element?
What replaces the HF28951 filter element?
How do I read the HF28951 part number?
Is a same-envelope aftermarket element always a drop-in replacement?
How often should a hydraulic return-line element be replaced?
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.