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Donaldson · Hydraulic Catalog · inline line

P171538 filter element: specifications & equivalents

The P171538 is a Donaldson inline-line hydraulic filter element, built with synteq media, rated at 23 µm class. Verify against the current manufacturer data sheet before ordering.

Filtration rating 23 µm nom.
Media Synteq
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.

OD/ID dimensions, collapse pressure and bypass settings are not printed in the filter-element choice table and are pending extraction from the housing dimension pages. Verify against the current Donaldson data sheet before ordering.

Specification table

ParameterValue
Filter type inline line
Media Synteq
Filtration rating 23 µm
Rating basis nominal
Length 203 mm
Integral bypass valve none (housing/valve-dependent)
Manufacturer part no. P171538
Source catalog Donaldson Company: Hydraulic Filtration Product Guide (F112100-ENG)
Last verified2026-09-28

Sources: Donaldson Company — Hydraulic Filtration Product Guide (F112100-ENG) — accessed 2026-09-27.

Donaldson® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Donaldson distributor.

Cross references & equivalents

Equivalent modelBrandMatch levelNote
↔ HD10008MANN-FILTERpartialMANN-FILTER's online catalog lists P171538 (DONALDSON) as a comparison number for HD10008. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF29205FleetguardpartialFleetguard's online catalog lists P171538 as an interchange for HF29205. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ R140G25BFiltrecpartialFiltrec's official Cross Navigator maps DONALDSON P171538 to FILTREC R140G25B as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (23 vs 22 µm) — verify efficiency class and collapse/seal for the housing 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.

Full chart: Donaldson cross reference chart →

How the P171538 model number is decoded

  • P171538Donaldson hydraulic filter element part number per the Hydraulic Filtration Product Guide (F112100-ENG).
  • FIKProduct family: FIK.
  • SynteqFilter media: Synteq.
  • 23 μmNominal filtration rating at βx(c) = 2 per ISO 16889.

Typical equipment & applications

  • Donaldson FIK hydraulic filter housing

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.

Frequently asked questions

What micron rating does P171538 use?
This element is rated 23 µm (nominal class). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the P171538 filter element?
3 partial match(es) requiring parameter review
How do I read the P171538 part number?
See the designation decoder above: each segment of P171538 encodes size, line type, filtration grade and media/collapse execution.

Other models in the Hydraulic Catalog series

All 360 →
P160700 150 µm P161016 4 µm P161571 22 µm P162233 75 µm P163542 11 µm P163567 23 µm P163945 150 µm P164056 13 µm P164059 22 µm P164405 4 µm

Reviewed & verified by the ElementRef engineering desk against Donaldson Company on 2026-09-28. Read our editorial & correction policy.