Fleetguard · HF Hydraulic · return line
HF29159 filter element: specifications & equivalents
The HF29159 is a Fleetguard return-line hydraulic filter element, built with cellulose media, rated at 24.9 µm absolute (24.9 µm at β75(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Filtration rating 24.9 µm abs.
Beta rating 24.9 µm at β75(c) per ISO 16889
Media Cellulose
Line type return
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 | return line |
| Media | Cellulose |
| Filtration rating | 24.9 µm |
| Rating basis | absolute |
| Beta ratio | 24.9 µm at β75(c) per ISO 16889 |
| Length | 178.5 mm |
| End caps | spin-on baseplate with attached gasket |
| Flow direction | outside-in |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF29159 |
| 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 |
|---|---|---|---|
|
↔ 64420903 page in verification queue | UFI | partial | Fleetguard's online catalog lists 64420903 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84239756 page in verification queue | UFI | partial | Fleetguard's online catalog lists 84239756 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84814327 page in verification queue | UFI | partial | Fleetguard's online catalog lists 84814327 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ALH16506 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ALH16506 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ERC21NCC page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ERC21NCC as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY421W page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HY421W as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ P171635 | Donaldson | partial | Fleetguard's online catalog lists P171635 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH66294 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH66294 as an interchange for HF29159. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ W13015 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists W13015 as an interchange for HF29159. 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 HF29159 model number is decoded
- HF29159Fleetguard HF-series hydraulic spin-on filter part number.
- 178.5 mmOverall height.
- 24.9 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
- 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 micron rating does HF29159 use?
This element is rated 24.9 µm absolute — 24.9 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 HF29159 filter element?
9 partial match(es) requiring parameter review
How do I read the HF29159 part number?
See the designation decoder above: each segment of HF29159 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.