Fleetguard · HF Hydraulic · inline line
HF6908 filter element: specifications & equivalents
The HF6908 is a Fleetguard inline-line hydraulic filter element, built with cellulose media, sized 99.5 × 154.5 mm OD × length (ID 52.5 mm), rated at 35 µm absolute (35 µm at β75(c); 30 µm at β200(c); 60 µm at β1000(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Specifications and cross-references are taken from the Fleetguard online catalog API. Where both TWA and Beta ratings are published the conventions differ — verify cleanliness targets, collapse rating and seal configuration against the current Fleetguard data sheet before ordering.
Specification table
| Parameter | Value |
|---|---|
| Filter type | inline line |
| Media | Cellulose |
| Filtration rating | 35 µm |
| Rating basis | absolute |
| Beta ratio | 35 µm at β75(c); 30 µm at β200(c); 60 µm at β1000(c) per ISO 16889 |
| Outside diameter OD | 99.5 mm |
| Inside diameter ID | 52.5 mm |
| Length | 154.5 mm |
| End caps | open-ended cartridge element |
| Rated flow | 42 L/min |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6908 |
| Source catalog | Cummins Filtration / Fleetguard: Fleetguard online product catalog (fleetguard.com) |
| Last verified | 2026-09-28 |
Sources: Cummins Filtration / Fleetguard — Fleetguard online product catalog (fleetguard.com) — accessed 2026-09-28.
Fleetguard® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Fleetguard distributor.
Dimensions & series range
| Outside diameter | 99.5 mm (3.917 in) |
| Inside diameter | 52.5 mm (2.067 in) |
| Overall length | 154.5 mm (6.083 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 7686900 page in verification queue | UFI | partial | Fleetguard's online catalog lists 7686900 as an interchange for HF6908. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 852438MIC10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 852438MIC10 as an interchange for HF6908. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0690800 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0690800 as an interchange for HF6908. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ RL-035-L-10-B | STAUFF | partial | Fleetguard's online catalog lists RL035L10B as an interchange for HF6908. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ RL-035-L-20-B | STAUFF | partial | Fleetguard's online catalog lists RL035L20B as an interchange for HF6908. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WGH9730 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists WGH9730 as an interchange for HF6908. 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 HF6908 model number is decoded
- HF6908Fleetguard HF-series hydraulic cartridge element part number.
- 154.5 mmOverall height.
- 99.5 mmLargest outside diameter.
- 52.5 mmLargest end inside diameter.
- 35 µm at β75(c); 30 µm at β200(c); 60 µm at β1000(c) per ISO 16889Published efficiency ratings.
Typical equipment & applications
- Construction, agricultural and industrial hydraulic circuits
- Mobile-equipment hydraulic return and pressure lines
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 HF6908 filter element?
What micron rating does HF6908 use?
What replaces the HF6908 filter element?
How do I read the HF6908 part number?
Is a same-envelope aftermarket element always a drop-in replacement?
How often should a hydraulic return-line element be replaced?
Other models in the HF Hydraulic series
All 2621 →Reviewed & verified by the ElementRef engineering desk against Cummins Filtration / Fleetguard on 2026-09-28. Read our editorial & correction policy.