MANN-FILTER · HD / WD Hydraulic · inline line
WD940/4 filter element: specifications & equivalents
The WD940/4 is a MANN-FILTER inline-line hydraulic filter element, sized 93 × 162 mm OD × length (ID 62 mm). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 93 × 162 mm
Inside diameter 62 mm
Thread M24x1.5
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 | 93 mm |
| Inside diameter ID | 62 mm |
| Length | 162 mm |
| Thread / connection | M24x1.5 |
| End caps | spin-on baseplate with attached gasket |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | WD940/4_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 | 93 mm (3.661 in) |
| Inside diameter | 62 mm (2.441 in) |
| Overall length | 162 mm (6.378 in) |
All 93×162 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1534759 page in verification queue | UFI | partial | MANN-FILTER's online catalog lists 1534759 (TRP DAF (TRUCK AND TRAILER)) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 57201 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists 57201 (WIX) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 8601400 page in verification queue | UFI | partial | MANN-FILTER's online catalog lists 86.014.00 (UFI) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ BT8415 | Baldwin Filters | partial | MANN-FILTER's online catalog lists BT8415 (BALDWIN) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ BT8415 | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists WD9404 (MANN & HUMMEL) as replaced by Baldwin BT8415. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H17WD03 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists H17WD03 (HENGST) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC10 page in verification queue | Pall | partial | MANN-FILTER's online catalog lists HC 10 (MAHLE (KNECHT/MAHLE)) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HF6316 | Fleetguard | partial | MANN-FILTER's online catalog lists HF6316 (FLEETGUARD/CUMMINS FILTRATION) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HF6316 | Fleetguard | partial | Fleetguard's online catalog lists WD9404 as an interchange for HF6316. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HSM6008 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists HSM 6008 (COOPERS) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L323 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists L323 (KRALINATOR) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LFH8728 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists LFH 8728 (LUBER-FINER) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LFH87281 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists LFH8728-1 (LUBER-FINER) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P551757 page in verification queue | Donaldson | partial | MANN-FILTER's online catalog lists P551757 (DONALDSON) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P8552 page in verification queue | Donaldson | partial | MANN-FILTER's online catalog lists P8552 (FRAM) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P8883 page in verification queue | Donaldson | partial | MANN-FILTER's online catalog lists P8883 (FRAM) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PER303H page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists PER 303 H (PUROLATOR) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT51 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists PT51 (BALDWIN) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH56366 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SH 56366 (HIFI-FILTER (JURA FILTRATION)) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SO8528HNP page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SO8528HNP (FILMAR) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SPH21004 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists SPH 21004 (SCHUPP / SF FILTER) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ VPX3230 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists VPX 3230 (VAPORMATIC) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WGH6316 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists WGH6316 (WOODGATE) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WHS46361 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists WHS46361 (WISMET) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WL10244 page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists WL 10244 (WIX) as a comparison number for WD9404. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ZP3208A page in verification queue | Aftermarket | partial | MANN-FILTER's online catalog lists ZP 3208 A (FIL FILTER) as a comparison number for WD9404. 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 WD940/4 model number is decoded
- WD940/4MANN-FILTER hydraulic spin-on filter part number.
- 162 mmElement height (H).
- 93 mmOuter diameter (A).
- 62 mmInner diameter (B).
- M24x1.5Spin-on mounting thread.
- 2.5Bypass valve opening pressure.
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 WD940/4 filter element?
The published envelope is 93 mm OD × 162 mm length with a 62 mm inside diameter (3.661 × 6.378 in × 2.441 in ID). Confirm against the housing drawing before ordering.
What replaces the WD940/4 filter element?
26 partial match(es) requiring parameter review
How do I read the WD940/4 part number?
See the designation decoder above: each segment of WD9404 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 93×162 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.