Fleetguard · HF Hydraulic · return line

HF6555 filter element: specifications & equivalents

Q: What are the dimensions of the HF6555 filter element?

The published envelope is 97.94 mm OD × 240.03 mm length (3.856 × 9.450 in). Confirm against the housing drawing before ordering.

Q: What micron rating does HF6555 use?

This element is rated 7 µm (nominal class) — TWA 7 µm at β=2 per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The HF6555 is a Fleetguard return-line hydraulic filter element, sized 97.94 × 240.03 mm OD × length, rated at 7 µm class (TWA 7 µm at β=2 per ISO 16889). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 97.94 × 240.03 mm

Filtration rating 7 µm nom.

Beta rating TWA 7 µm at β=2 per ISO 16889

Thread 1.00 3/8-12 UNF-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	7 µm
Rating basis	nominal
Beta ratio	TWA 7 µm at β=2 per ISO 16889
Outside diameter OD	97.94 mm
Length	240.03 mm
Thread / connection	1.00 3/8-12 UNF-2B
End caps	spin-on baseplate with attached gasket
Flow direction	outside-in
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	HF6555
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	97.94 mm (3.856 in)
Overall length	240.03 mm (9.450 in)

All 98×240 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ 10013529 page in verification queue	UFI	partial	Fleetguard's online catalog lists 10013529 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 11036607 page in verification queue	UFI	partial	Fleetguard's online catalog lists 11036607 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 110366077 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 110366077 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1176501120 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1176501120 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1281327H1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1281327H1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 128132H1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 128132H1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1298357 page in verification queue	UFI	partial	Fleetguard's online catalog lists 1298357 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1346028C1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1346028C1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1353155 page in verification queue	UFI	partial	Fleetguard's online catalog lists 1353155 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1382725 page in verification queue	UFI	partial	Fleetguard's online catalog lists 1382725 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1495 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1495 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1604694490 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1604694490 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1604694491 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1604694491 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1971727C1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1971727C1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 1H0519 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 1H0519 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 2088466 page in verification queue	UFI	partial	Fleetguard's online catalog lists 2088466 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 210034 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 210034 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 2394166 page in verification queue	UFI	partial	Fleetguard's online catalog lists 2394166 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 303506819 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 303506819 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 3098170310 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 3098170310 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 317883 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 317883 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 317883HEU page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 317883HEU as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 32909200 page in verification queue	UFI	partial	Fleetguard's online catalog lists 32909200 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 32910601 page in verification queue	UFI	partial	Fleetguard's online catalog lists 32910601 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 32910601A page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 32910601A as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 3515328M91 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 3515328M91 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 3621281M1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 3621281M1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 398865 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 398865 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 3I0612 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 3I0612 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 428088 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 428088 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 431587A1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 431587A1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 47917358 page in verification queue	UFI	partial	Fleetguard's online catalog lists 47917358 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 503493T91 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 503493T91 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 503632T91 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 503632T91 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 51495	WIX Filters	partial	Fleetguard's online catalog lists 51495 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 6050119 page in verification queue	UFI	partial	Fleetguard's online catalog lists 6050119 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 6060011165 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 6060011165 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 675124193071 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 675124193071 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 73144499 page in verification queue	UFI	partial	Fleetguard's online catalog lists 73144499 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 73148373 page in verification queue	UFI	partial	Fleetguard's online catalog lists 73148373 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 76040367 page in verification queue	UFI	partial	Fleetguard's online catalog lists 76040367 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 76076923 page in verification queue	UFI	partial	Fleetguard's online catalog lists 76076923 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 76700 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 76700 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 84031880 page in verification queue	UFI	partial	Fleetguard's online catalog lists 84031880 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 84074777 page in verification queue	UFI	partial	Fleetguard's online catalog lists 84074777 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 84226258 page in verification queue	UFI	partial	Fleetguard's online catalog lists 84226258 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 84239751 page in verification queue	UFI	partial	Fleetguard's online catalog lists 84239751 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 85495 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 85495 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 87022001 page in verification queue	UFI	partial	Fleetguard's online catalog lists 87022001 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 900278Q20Q page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 900278Q20Q as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 900280Q10Q page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 900280Q10Q as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 906602T1 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 906602T1 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 92495 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 92495 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 9281387 page in verification queue	UFI	partial	Fleetguard's online catalog lists 9281387 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 933431 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 933431 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 944025Q	Parker	partial	Fleetguard's online catalog lists 944025Q as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 97710 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 97710 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 9T5916 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 9T5916 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ AH114973 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists AH114973 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ AY075 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists AY075 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ BT758 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists BT758 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ BT8550MPG page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists BT8550MPG as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ BT8850 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists BT8850 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ BT8850-MPG	Baldwin Filters	partial	Fleetguard's online catalog lists BT8850MPG as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ BT8850-MPG	Baldwin Filters	partial	Baldwin's Form 561 Number-Finder cross-reference lists HF6555 (FLEETGUARD) as replaced by Baldwin BT8850-MPG. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting.
↔ BT9362MPG page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists BT9362MPG as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ CG49CC22 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists CG49CC22 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ CPK1532 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists CPK1532 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ CS1551H page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists CS1551H as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ D163324SP1010 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists D163324SP1010 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ D94236 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists D94236 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ F435202 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists F435202 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ G7649 page in verification queue	Parker	partial	Fleetguard's online catalog lists G7649 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ H56062 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists H56062 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HC5508 page in verification queue	Pall	partial	Fleetguard's online catalog lists HC5508 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF0655500 page in verification queue	Fleetguard	partial	Fleetguard's online catalog lists HF0655500 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF720 page in verification queue	Fleetguard	partial	Fleetguard's online catalog lists HF720 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HP409L925MB page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists HP409L925MB as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ L252 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists L252 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ L494 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists L494 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ LFH4910 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists LFH4910 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ LFH49101 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists LFH49101 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ LFH49621 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists LFH49621 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ LFH5079G page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists LFH5079G as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ N6757 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists N6757 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ N9025 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists N9025 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P146Z460 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P146Z460 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P163484 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P163484 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P164091 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P164091 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P164384	Donaldson	partial	Fleetguard's online catalog lists P164384 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P165615 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P165615 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P165733 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P165733 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P166086 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P166086 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P169285 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P169285 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P169745 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P169745 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P171089 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P171089 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P574000 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P574000 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P6871 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P6871 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ P762797 page in verification queue	Donaldson	partial	Fleetguard's online catalog lists P762797 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ PF10530 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists PF10530 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ PF2152 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists PF2152 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ PSH025 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists PSH025 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ PT8863 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists PT8863 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ R263 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists R263 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ RE34958 page in verification queue	STAUFF	partial	Fleetguard's online catalog lists RE34958 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ S109668 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists S109668 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ SH56605 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists SH56605 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ SH56617 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists SH56617 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ SH66338 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists SH66338 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ SH66351 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists SH66351 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ TRA8320047 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists TRA8320047 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ VPK1532 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists VPK1532 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ WGH6555 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists WGH6555 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ WH980 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists WH980 as an interchange for HF6555. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ WOH201 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists WOH201 as an interchange for HF6555. 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 HF6555 model number is decoded

HF6555Fleetguard HF-series hydraulic spin-on filter part number.
240.03 mmOverall height.
97.94 mmLargest outside diameter.
1.00 3/8-12 UNF-2BSpin-on mounting thread.
TWA 7 µm at β=2 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 HF6555 filter element?

The published envelope is 97.94 mm OD × 240.03 mm length (3.856 × 9.450 in). Confirm against the housing drawing before ordering.

What micron rating does HF6555 use?

This element is rated 7 µm (nominal class) — TWA 7 µm at β=2 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 HF6555 filter element?

115 partial match(es) requiring parameter review

How do I read the HF6555 part number?

See the designation decoder above: each segment of HF6555 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 10 catalog element(s) share the 98×240 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

HF6518 Fleetguard · 3 µm HF6551 Fleetguard · 1 µm HF6557 Fleetguard · 9 µm HF6561 Fleetguard · 3 µm HF6565 Fleetguard · 9 µm HF6569 Fleetguard · 25 µm HF6573 Fleetguard · 6 µm HF6575 Fleetguard · 9 µm HF6577 Fleetguard · 25 µm HF6578 Fleetguard · 8 µm

Other models in the HF Hydraulic series

All 2621 →

HF28084 HF28086 HF28088 HF28201 HF28202 97×247 mm HF28652 HF28658 95×193 mm HF28660 HF28662 HF28667

Reviewed & verified by the ElementRef engineering desk against Cummins Filtration / Fleetguard on 2026-09-28. Read our editorial & correction policy.