MANN-FILTER · HD / WD Hydraulic · inline line
HD4004 filter element: specifications & equivalents
The HD4004 is a MANN-FILTER inline-line hydraulic filter element, sized 44 × 179 mm OD × length (ID 21 mm). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 44 × 179 mm
Inside diameter 21 mm
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic
catalog / official interchange document and checked 2026-09-28. Confidence score 0.92.
Dimensions and comparison numbers are taken from the MANN-FILTER online catalog API. Beta rating, collapse pressure and seal material vary by execution — verify against the current MANN data sheet before ordering.
Specification table
| Parameter | Value |
|---|---|
| Filter type | inline line |
| Outside diameter OD | 44 mm |
| Inside diameter ID | 21 mm |
| Length | 179 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HD4004_MANN-FILTER |
| Source catalog | MANN+HUMMEL / MANN-FILTER: MANN-FILTER online product catalog GraphQL API (mann-filter.com, store pcat_mf_en_store_en) |
| Last verified | 2026-09-28 |
Sources: MANN+HUMMEL / MANN-FILTER — MANN-FILTER online product catalog GraphQL API (mann-filter.com, store pcat_mf_en_store_en) — accessed 2026-09-27.
MANN-FILTER® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized MANN-FILTER distributor.
Dimensions & series range
| Outside diameter | 44 mm (1.732 in) |
| Inside diameter | 21 mm (0.827 in) |
| Overall length | 179 mm (7.047 in) |
All 44×179 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 7702900 page in verification queue | UFI | partial | MANN-FILTER's online catalog lists 77.029.00 (UFI) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CDM102FV1 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists CDM 102-FV-1 (SOFIMA) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CM18003 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists CM 180/03 (FBO) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ D311G10A page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists D311G10A (FILTREC) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ D311G25A page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists D311G25A (FILTREC) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ EPA12NFD page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists EPA12NFD (UFI) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H42110 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists H-42110 (SAKURA) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HP0372A25N page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HP0372A25N (MP FILTRI) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HP0394A25ANP01 | MP Filtri | partial | MANN-FILTER's online catalog lists HP0394A25ANP01 (MP FILTRI) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HPO372A25A page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HPO372A25A (MP FILTRI) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY18269 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HY 18269 (SCHUPP / SF FILTER) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P171709 page in verification queue | Donaldson | partial | MANN-FILTER's online catalog lists P171709 (DONALDSON) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT23524-MPG | Baldwin Filters | partial | MANN-FILTER's online catalog lists PT23524MPG (BALDWIN) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SFH1709 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SFH1709 (SURE FILTER) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH63911 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SH 63911 (HIFI-FILTER (JURA FILTRATION)) as a comparison number for HD4004. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ Z0372A25NA page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists Z-037-2-A25-N-A (FAI FILTRI) as a comparison number for HD4004. 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 HD4004 model number is decoded
- HD4004MANN-FILTER hydraulic cartridge element part number.
- 179 mmElement height (H).
- 44 mmOuter diameter (A).
- 21 mmInner diameter (B).
Typical equipment & applications
- Replacement element for OEM hydraulic filter housings
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 HD4004 filter element?
The published envelope is 44 mm OD × 179 mm length with a 21 mm inside diameter (1.732 × 7.047 in × 0.827 in ID). Confirm against the housing drawing before ordering.
What replaces the HD4004 filter element?
16 partial match(es) requiring parameter review
How do I read the HD4004 part number?
See the designation decoder above: each segment of HD4004 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 6 catalog element(s) share the 44×179 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.
Other models in the HD / WD Hydraulic series
All 880 →Reviewed & verified by the ElementRef engineering desk against MANN+HUMMEL / MANN-FILTER on 2026-09-28. Read our editorial & correction policy.