Fleetguard · HF Hydraulic · return line
HF35018 filter element: specifications & equivalents
The HF35018 is a Fleetguard return-line hydraulic filter element. Verify against the current manufacturer data sheet before ordering.
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 |
| Length | 177.57 mm |
| End caps | spin-on baseplate with attached gasket |
| Flow direction | outside-in |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF35018 |
| 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.
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 0937521 page in verification queue | UFI | partial | Fleetguard's online catalog lists 0937521 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 15645153410 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 15645153410 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1621 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 19812461000 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 19812461000 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2898194 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2898194 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 370203M91 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 370203M91 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3705452M2 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3705452M2 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 425S052760 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 425S052760 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51621 | WIX Filters | partial | Fleetguard's online catalog lists 51621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 5220015320 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 5220015320 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 551621 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 551621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 60277731 page in verification queue | UFI | partial | Fleetguard's online catalog lists 60277731 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 83984918 page in verification queue | UFI | partial | Fleetguard's online catalog lists 83984918 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85621 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92621 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 937520 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 937520 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 937521 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 937521 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 937521X page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 937521X as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ BT305 | Baldwin Filters | partial | Fleetguard's online catalog lists BT305 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ BT305 | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists HF35018 (FLEETGUARD) as replaced by Baldwin BT305. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C45702411 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C45702411 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C4570411 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C4570411 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FJX276 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FJX276 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC5801 page in verification queue | Pall | partial | Fleetguard's online catalog lists HC5801 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HC8501 page in verification queue | Pall | partial | Fleetguard's online catalog lists HC8501 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HH52015320 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HH52015320 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HY372W page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HY372W as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ KUBOTA page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists KUBOTA as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L1621 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L1621 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LFH8217 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LFH8217 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P502082 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P502082 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P551348 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P551348 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P8480 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P8480 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PSH305 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PSH305 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RJ617X page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RJ617X as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH66054 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH66054 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ UWP110 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists UWP110 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ W21TSH5200 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists W21TSH5200 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ W9352 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists W9352 as an interchange for HF35018. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ WP110 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists WP110 as an interchange for HF35018. 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 HF35018 model number is decoded
- HF35018Fleetguard HF-series hydraulic spin-on filter part number.
- 177.57 mmOverall height.
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 replaces the HF35018 filter element?
40 partial match(es) requiring parameter review
How do I read the HF35018 part number?
See the designation decoder above: each segment of HF35018 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.