MANN-FILTER · HD / WD Hydraulic · inline line
HD9021X filter element: specifications & equivalents
The HD9021X is a MANN-FILTER inline-line hydraulic filter element, sized 90 × 291 mm OD × length (ID 47 mm). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 90 × 291 mm
Inside diameter 47 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 | 90 mm |
| Inside diameter ID | 47 mm |
| Length | 291 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HD9021X_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 | 90 mm (3.543 in) |
| Inside diameter | 47 mm (1.850 in) |
| Overall length | 291 mm (11.457 in) |
All 90×291 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ AS201 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists AS 201 (ASAS) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ EY1139HD669 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists EY1139H D669 (HENGST) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FH1209 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists FH-1209 (FILDA FILTER) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H7912 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists H7912 (SAKURA) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HF7922 | Fleetguard | partial | MANN-FILTER's online catalog lists HF7922 (FLEETGUARD/CUMMINS FILTRATION) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HFR87922 page in verification queue | Fleetguard | partial | MANN-FILTER's online catalog lists HFR87922 (FLEETRITE) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY90651 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HY 90651 (SCHUPP / SF FILTER) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY9357 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HY 9357 (SCHUPP / SF FILTER) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH5747 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists LH5747 (LUBER-FINER) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550578 page in verification queue | Donaldson | partial | MANN-FILTER's online catalog lists P550578 (DONALDSON) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT8359 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists PT8359 (BALDWIN) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8479 | Baldwin Filters | partial | MANN-FILTER's online catalog lists PT8479 (BALDWIN) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SFH2410 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SFH2410 (SURE FILTER) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH60144 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SH 60144 (HIFI-FILTER (JURA FILTRATION)) as a comparison number for HD9021X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WGH1971 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists WGH1971 (WOODGATE) as a comparison number for HD9021X. 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 HD9021X model number is decoded
- HD9021XMANN-FILTER hydraulic cartridge element part number.
- 291 mmElement height (H).
- 90 mmOuter diameter (A).
- 47 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 HD9021X filter element?
The published envelope is 90 mm OD × 291 mm length with a 47 mm inside diameter (3.543 × 11.457 in × 1.850 in ID). Confirm against the housing drawing before ordering.
What replaces the HD9021X filter element?
15 partial match(es) requiring parameter review
How do I read the HD9021X part number?
See the designation decoder above: each segment of HD9021X 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 1 catalog element(s) share the 90×291 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.