MANN-FILTER · HD / WD Hydraulic · inline line

WD8001 filter element: specifications & equivalents

Q: What are the dimensions of the WD8001 filter element?

The published envelope is 80 mm OD × 100 mm length (3.150 × 3.937 in). Confirm against the housing drawing before ordering.

The WD8001 is a MANN-FILTER inline-line hydraulic filter element, sized 80 × 100 mm OD × length. Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 80 × 100 mm

Thread 3/4-16 UNF

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	80 mm
Length	100 mm
Thread / connection	3/4-16 UNF
End caps	spin-on baseplate with attached gasket
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	WD8001_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	80 mm (3.150 in)
Overall length	100 mm (3.937 in)

All 80×100 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ HC18050 page in verification queue	Pall	partial	MANN-FILTER's online catalog lists HC-18050 (SAKURA) as a comparison number for WD8001. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF35308	Fleetguard	partial	Fleetguard's online catalog lists WD8001 as an interchange for HF35308. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HY437W page in verification queue	Aftermarket	partial	MANN-FILTER's online catalog lists HY437W (HENGST) as a comparison number for WD8001. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ SO8658H page in verification queue	Aftermarket	partial	MANN-FILTER's online catalog lists SO8658H (FILMAR) as a comparison number for WD8001. 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 WD8001 model number is decoded

WD8001MANN-FILTER hydraulic spin-on filter part number.
100 mmElement height (H).
80 mmOuter diameter (A).
3/4-16 UNFSpin-on mounting thread.

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 WD8001 filter element?

The published envelope is 80 mm OD × 100 mm length (3.150 × 3.937 in). Confirm against the housing drawing before ordering.

What replaces the WD8001 filter element?

4 partial match(es) requiring parameter review

How do I read the WD8001 part number?

See the designation decoder above: each segment of WD8001 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 80×100 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

WD8002 MANN-FILTER

Other models in the HD / WD Hydraulic series

All 880 →

HD10001 103×482 mm HD10002 99×177 mm HD10004 99×141 mm HD10006 99×155 mm HD10007 99×218 mm HD10008 99×218 mm HD10011X 99×210 mm HD10012X 99×330 mm HD10013 100×438 mm HD10014 99×155 mm

Reviewed & verified by the ElementRef engineering desk against MANN+HUMMEL / MANN-FILTER on 2026-09-28. Read our editorial & correction policy.