ElementRef

MANN-FILTER · HD / WD Hydraulic · inline line

WD13145/23 filter element: specifications & equivalents

The WD13145/23 is a MANN-FILTER inline-line hydraulic filter element, sized 135 × 303 mm OD × length. Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 135 × 303 mm
Thread 1 1/2-16 UN-2B
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

ParameterValue
Filter type inline line
Outside diameter OD 135 mm
Length 303 mm
Thread / connection 1 1/2-16 UN-2B
End caps spin-on baseplate with attached gasket
Integral bypass valve none (housing/valve-dependent)
Manufacturer part no. WD13145/23_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 verified2026-09-28

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 diameter135 mm (5.315 in)
Overall length303 mm (11.929 in)

Cross references & equivalents

No catalog-verified cross references yet. This model is in the manual verification queue — request a verified equivalent.

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 WD13145/23 model number is decoded

  • WD13145/23MANN-FILTER hydraulic spin-on filter part number.
  • 303 mmElement height (H).
  • 135 mmOuter diameter (A).
  • 1 1/2-16 UN-2BSpin-on mounting thread.
  • 2Bypass 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 WD13145/23 filter element?
The published envelope is 135 mm OD × 303 mm length (5.315 × 11.929 in). Confirm against the housing drawing before ordering.
What replaces the WD13145/23 filter element?
Cross references are being verified for this model — use the inquiry form and the engineering desk will confirm equivalents.
How do I read the WD13145/23 part number?
See the designation decoder above: each segment of WD1314523 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 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.