Fleetguard · HF Hydraulic · inline line
HF8123 filter element: specifications & equivalents
The HF8123 is a Fleetguard inline-line hydraulic filter element, sized 99.31 × 234.19 mm OD × length (ID 45.85 mm). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 99.31 × 234.19 mm
Inside diameter 45.85 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 | 99.31 mm |
| Inside diameter ID | 45.85 mm |
| Length | 234.19 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF8123 |
| 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 | 99.31 mm (3.910 in) |
| Inside diameter | 45.85 mm (1.805 in) |
| Overall length | 234.19 mm (9.220 in) |
All 99×234 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 2062535 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2062535 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 50309D149W page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 50309D149W as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 57843 | WIX Filters | partial | Fleetguard's online catalog lists 57843 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 6100EAL1503N1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 6100EAL1503N1 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7630757 page in verification queue | UFI | partial | Fleetguard's online catalog lists 7630757 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7843 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 7843 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 818BMS98CB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 818BMS98CB as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84843 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 84843 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 925777 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 925777 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 9700EAL1503N1 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 9700EAL1503N1 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ D650T150A page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists D650T150A as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0812300 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0812300 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF4050TCB page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF4050TCB as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HKS149W page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HKS149W as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ KHM150 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists KHM150 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ KM150 | Schroeder Industries | partial | Fleetguard's online catalog lists KM150 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P173780 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P173780 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PPL97009150SSB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PPL97009150SSB as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT23297 | Baldwin Filters | partial | Fleetguard's online catalog lists PT23297 as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SFKM150SB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SFKM150SB as an interchange for HF8123. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ TTK9149WB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists TTK9149WB as an interchange for HF8123. 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 HF8123 model number is decoded
- HF8123Fleetguard HF-series hydraulic cartridge element part number.
- 234.19 mmOverall height.
- 99.31 mmLargest outside diameter.
- 45.85 mmLargest end inside 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 HF8123 filter element?
The published envelope is 99.31 mm OD × 234.19 mm length with a 45.85 mm inside diameter (3.910 × 9.220 in × 1.805 in ID). Confirm against the housing drawing before ordering.
What replaces the HF8123 filter element?
21 partial match(es) requiring parameter review
How do I read the HF8123 part number?
See the designation decoder above: each segment of HF8123 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 15 catalog element(s) share the 99×234 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.