Fleetguard · HF Hydraulic · inline line
HF6066 filter element: specifications & equivalents
The HF6066 is a Fleetguard inline-line hydraulic filter element, sized 183.9 × 63.5 mm OD × length. Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 183.9 × 63.5 mm
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.
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 |
| Outside diameter OD | 183.9 mm |
| Length | 63.5 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6066 |
| 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 | 183.9 mm (7.240 in) |
| Overall length | 63.5 mm (2.500 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 100759 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 100759 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1469 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1469 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 384 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 384 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 388080R93 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 388080R93 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 388084R91 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 388084R91 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 388084R92 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 388084R92 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 388084R93 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 388084R93 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3888984R93 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3888984R93 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51469 | WIX Filters | partial | Fleetguard's online catalog lists 51469 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 6439236 page in verification queue | UFI | partial | Fleetguard's online catalog lists 6439236 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85469 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85469 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 897 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 897 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92156917 page in verification queue | UFI | partial | Fleetguard's online catalog lists 92156917 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92469 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92469 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C4611 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C4611 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C7031 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C7031 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FH47 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FH47 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H10025 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H10025 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0606600 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0606600 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0606600J page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0606600 J as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF759 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF759 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH4942 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LH4942 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P551196 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P551196 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P759 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P759 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P779551 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P779551 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PF835 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PF835 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PL384 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PL384 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PM489 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PM489 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT558 | Baldwin Filters | partial | Fleetguard's online catalog lists PT558 as an interchange for HF6066. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT558 | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists HF6066 (FLEETGUARD) as replaced by Baldwin PT558. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ R25 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists R25 as an interchange for HF6066. 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 HF6066 model number is decoded
- HF6066Fleetguard HF-series hydraulic cartridge element part number.
- 63.5 mmOverall height.
- 183.9 mmLargest outside diameter.
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 HF6066 filter element?
The published envelope is 183.9 mm OD × 63.5 mm length (7.240 × 2.500 in). Confirm against the housing drawing before ordering.
What replaces the HF6066 filter element?
31 partial match(es) requiring parameter review
How do I read the HF6066 part number?
See the designation decoder above: each segment of HF6066 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 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.