Fleetguard · HF Hydraulic · return line
HF6779 filter element: specifications & equivalents
The HF6779 is a Fleetguard return-line hydraulic filter element, sized 128.93 × 170.41 mm OD × length, rated at 10 µm absolute (10 µm at β75(c); 13.7 µm at β200(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 128.93 × 170.41 mm
Filtration rating 10 µm abs.
Beta rating 10 µm at β75(c); 13.7 µm at β200(c) per ISO 16889
Thread 1.00 1/2-16 UN-2B
Line type return
Catalog verified. Parameters extracted from the manufacturer’s electronic
catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.
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 | return line |
| Filtration rating | 10 µm |
| Rating basis | absolute |
| Beta ratio | 10 µm at β75(c); 13.7 µm at β200(c) per ISO 16889 |
| Outside diameter OD | 128.93 mm |
| Length | 170.41 mm |
| Thread / connection | 1.00 1/2-16 UN-2B |
| End caps | spin-on baseplate with attached gasket |
| Flow direction | outside-in |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6779 |
| 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 | 128.93 mm (5.076 in) |
| Overall length | 170.41 mm (6.709 in) |
All 129×170 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 0750425001 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 0750425001 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 10SL140H10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 10SL140H10 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 10SL140H15 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 10SL140H15 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1105292 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1105292 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1108782 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1108782 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 138404A page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 138404A as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 160MA010BN page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 160MA010BN as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 167500RH10XLS000M page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 167500RH10XLS000M as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 202986 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 202986 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2120149 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2120149 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 256554003 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 256554003 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3I0700 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3I0700 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4ZC84 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 4ZC84 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 5002409 page in verification queue | UFI | partial | Fleetguard's online catalog lists 5002409 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 569139D1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 569139D1 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 575994SYN page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 575994SYN as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 59945402 page in verification queue | UFI | partial | Fleetguard's online catalog lists 59945402 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 737724SYN page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 737724SYN as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7631727 page in verification queue | UFI | partial | Fleetguard's online catalog lists 7631727 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 928766Q page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 928766Q as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 9313155 page in verification queue | UFI | partial | Fleetguard's online catalog lists 9313155 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 9T8678 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 9T8678 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ A150G10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists A150G10 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ARH0475LB10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ARH0475LB10 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AY005 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AY005 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ BT8307-MPG | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists HF6779 (FLEETGUARD) as replaced by Baldwin BT8307-MPG. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CA301AFD1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CA301AFD1 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CP128210SYN50 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CP128210SYN50 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CSG100A10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CSG100A10 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ DMS11SN page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists DMS11SN as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ESF21NFC page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ESF21NFC as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ F4E050KCB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists F4E050KCB as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H4159 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H4159 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC55260 page in verification queue | Pall | partial | Fleetguard's online catalog lists HC55260 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC7500SDS4H page in verification queue | Pall | partial | Fleetguard's online catalog lists HC7500SDS4H as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC7500SKS4H page in verification queue | Pall | partial | Fleetguard's online catalog lists HC7500SKS4H as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
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↔ HC7500SUS4H page in verification queue | Pall | partial | Fleetguard's online catalog lists HC7500SUS4H as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC9500SUS4H page in verification queue | Pall | partial | Fleetguard's online catalog lists HC9500SUS4H as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0677900 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0677900 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF165875 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF165875 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY379WD697 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HY379WD697 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ K23064 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists K23064 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ MFE16010BN2 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists MFE16010BN2 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ P165875 | Donaldson | partial | Fleetguard's online catalog lists P165875 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ P167944 | Donaldson | partial | Fleetguard's online catalog lists P167944 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P562207 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P562207 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PR3960 page in verification queue | Parker | partial | Fleetguard's online catalog lists PR3960 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ R750H0412A page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists R750H0412A as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ SBF-7500-4Z10B | Schroeder Industries | partial | Fleetguard's online catalog lists SBF75004Z10B as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ SF-6730-MG | STAUFF | partial | STAUFF Filter Interchange lists HF 6779 (FLEETGUARD / CUMMINS) as replaced by SF-6730-MG. Envelope dimensions are published; media grade and performance data are not — confirm before substituting in cleanliness-critical circuits. |
| ↔ SF-6730-MG | STAUFF | partial | Fleetguard's online catalog lists SF6730MG as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SFH5875 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SFH5875 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ST2821 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ST2821 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ V0211B1V10 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists V0211B1V10 as an interchange for HF6779. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ WD13011X | MANN-FILTER | partial | MANN-FILTER's online catalog lists HF6779 (FLEETGUARD/CUMMINS FILTRATION) as a comparison number for WD13011X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ Z150297L page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists Z150297L as an interchange for HF6779. 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 HF6779 model number is decoded
- HF6779Fleetguard HF-series hydraulic spin-on filter part number.
- 170.41 mmOverall height.
- 128.93 mmLargest outside diameter.
- 1.00 1/2-16 UN-2BSpin-on mounting thread.
- 10 µm at β75(c); 13.7 µm at β200(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
- A return-line element is not a pressure-line element: return cartridges (BN4HC low-collapse) tolerate roughly 20 bar differential, while BH4HC pressure executions are rated to 210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
- This element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
- “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 HF6779 filter element?
The published envelope is 128.93 mm OD × 170.41 mm length (5.076 × 6.709 in). Confirm against the housing drawing before ordering.
What micron rating does HF6779 use?
This element is rated 10 µm absolute — 10 µm at β75(c); 13.7 µm at β200(c) per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the HF6779 filter element?
56 partial match(es) requiring parameter review
How do I read the HF6779 part number?
See the designation decoder above: each segment of HF6779 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 26 catalog element(s) share the 129×170 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.
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.