P551056 Donaldson Fuel Filter/Water Separator Replacement | Cross Reference
P551056 Donaldson Replacement Fuel Filter/Water Separator
P551056 is a Donaldson Twist&Drain™ spin-on fuel filter and water separator, designed
to remove water and contaminants from diesel fuel. DeMalong Filter manufactures a fully
equivalent aftermarket replacement for this part number.
Specifications
| Filter Type | Spin-on fuel filter / water separator (Twist&Drain™) |
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| OEM Manufacturer / Supplier | Donaldson |
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| Filter Media | Cellulose and meltblown synthetic media |
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| Micron Rating / Efficiency | 99% efficiency at 9–10 µm |
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| Emulsified Water Efficiency | 95% |
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| Outer Diameter | 107.3 mm (4.22 in) |
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| Overall Length | 147.1 mm (5.79 in) |
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| Gasket OD / ID | 88.4 mm (3.48 in) / 80.4 mm (3.17 in) |
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| Thread Size | 1-14 UN |
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| Test Standard | SAE J1985 |
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| Notes | Not for marine applications |
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OEM & Equivalent / Cross Reference Part Numbers
| Brand | Part Number |
|---|
| Donaldson | P551056 |
| Baldwin | BF1222, BF1222SP, BF1223, BF1223SP, BF1229, BF1230 |
| Fleetguard | FF5151 |
| WIX | 33411, 33617, 33970, 533970 |
| Napa | 3411, 3617 |
| Caterpillar | 3I1210, 3I1672 |
| New Holland | 7840136, 84446332, 87802929, 87803210 |
| Case IH | 1809623C1, 1811491C91, 1813104C91, 1816568C91 |
| SF-FILTER | SK3658 |
| Donaldson (replaced by) | P550548 |
| DeMalong Filter (our equivalent replacement) | Contact us for our part number |
Cross reference numbers are for identification purposes only. DeMalong Filter Inc. products are aftermarket replacements, not affiliated with, sponsored by, or manufactured by Donaldson.
Application Equipment & Industries
- RACOR R60T fuel filter housings
- New Holland CR and CX Series combine harvesters
- Freightliner M2 trucks (Caterpillar C9/C11 engines)
- Case IH agricultural and construction equipment
This filter is not intended for marine applications.
Quality & Testing
DeMalong Filter elements are manufactured under ISO 9001 quality management and tested to
SAE J1985 (fuel/water separation efficiency) and relevant ISO fuel filtration standards.
Packaging, Lead Time & Customization
| Packaging | Individual carton with DeMalong brand and part number, or neutral/customer-branded packaging on request; genuine product typically sold in multiples of 12 |
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| Samples | Available for testing and fitment verification before bulk order |
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| Lead Time & MOQ | Varies by order quantity — contact us for a specific lead time and MOQ quote |
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Frequently Asked Questions
- Can P551056 be used for marine fuel filtration?
- No, this part is explicitly noted as not for marine applications.
- What is the thread size?
- 1-14 UN.
- What efficiency does this filter provide?
- 99% particulate efficiency at 9–10 microns, and 95% emulsified water removal efficiency.
- Which equipment commonly uses this filter?
- RACOR R60T housings and New Holland CR/CX Series combines, among other applications.
- Is your replacement a genuine Donaldson part?
- No, it is an aftermarket equivalent engineered to match the OEM's fit, media, and performance.
You know you have received a quality DeMalong Filter hydraulic filter when you our logo on the filter box with our brand name and part number.
Our filters are built with the highest quality and reliability in mind so you know your equipment is safe and can keep running smoothly.
DeMalong Filter hydraulic filters can be used in a variety of industries including but not limited to: power generation, defense, oil/gas, marine and other motor sports, shipping and transportation, railroad, mining, pulp and paper, steel making and manufacturing, entertainment and various other industries.
All of our elements are manufactured according to ISO specifications, including: ISO 16889, Clean DP (low and high visc.) - ISO 3968, Fluid compatibility - ISO 2943, Flow fatigue resistance - ISO 3724, Dirt capacity - ISO 16889, Collapse pressure - ISO 2941
All items marked "Replacement" or "Interchange" are not affiliated with the original manufacture where names and part numbers are for cross reference only. All trademarks are trademarks of their respective owners. Reference is made to the OEM solely to identify the compatibility of DeMalong Filter Inc. filter with the OEM filter.
Images may be general representations of products and may vary from image. All items are sold by 1 unit unless a pack size is listed in the title description.
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