Fleetguard · HF Hydraulic · return line

HF6706 filter element: specifications & equivalents

Q: What are the dimensions of the HF6706 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.

Q: What micron rating does HF6706 use?

This element is rated 6 µm absolute — 6 µm at β75(c); 8 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.

The HF6706 is a Fleetguard return-line hydraulic filter element, sized 128.93 × 170.41 mm OD × length, rated at 6 µm absolute (6 µm at β75(c); 8 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 6 µm abs.

Beta rating 6 µm at β75(c); 8 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	6 µm
Rating basis	absolute
Beta ratio	6 µm at β75(c); 8 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.	HF6706
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
↔ 506M page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists 506M as an interchange for HF6706. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ 59888990 page in verification queue	UFI	partial	Fleetguard's online catalog lists 59888990 as an interchange for HF6706. 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 HF6706 (FLEETGUARD) as replaced by Baldwin BT8307-MPG. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting.
↔ HF0670600 page in verification queue	Fleetguard	partial	Fleetguard's online catalog lists HF0670600 as an interchange for HF6706. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ R750H0406 page in verification queue	Aftermarket	partial	Fleetguard's online catalog lists R750H0406 as an interchange for HF6706. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ V0211B1R05	Eaton / Internormen	partial	Fleetguard's online catalog lists V0211B1R05 as an interchange for HF6706. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ V0211B1R05	Eaton / Internormen	partial	Eaton's filtration cross-reference lists HF6706 (Fleetguard) as an interchange for V0211B1R05. Envelope cross-reference; verify micron grade, delta-P 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 HF6706 model number is decoded

HF6706Fleetguard 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.
6 µm at β75(c); 8 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 HF6706 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 HF6706 use?

This element is rated 6 µm absolute — 6 µm at β75(c); 8 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 HF6706 filter element?

7 partial match(es) requiring parameter review

How do I read the HF6706 part number?

See the designation decoder above: each segment of HF6706 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.

HF6130 Fleetguard · 26 µm HF6131 Fleetguard · 26 µm HF6132 Fleetguard · 26 µm HF6133 Fleetguard · 7 µm HF6163 Fleetguard · 16 µm HF6167 Fleetguard · 33 µm HF6358 Fleetguard · 16 µm HF6700 Fleetguard · 1 µm HF6703 Fleetguard · 3 µm HF6710 Fleetguard · 16 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.