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Perkins Fuel Water Separators
Perkins 4415122 Fuel Water Separator
The Perkins 4415122 fuel water separator is the pre-fuel filter listed for Perkins 1103, 1104 and 1106 Series engines. Whether it is right for your engine depends on the build, the installed position and the number on the element you are removing.
- Part number
- 4415122
- Type
- Fuel water separator (pre-fuel filter)
- Engine reference
- Perkins 1103 / 1104 / 1106 Series (to be confirmed)
Availability and delivery terms confirmed with quotation.
What the 4415122 Is — a Separator for the 1103/1104/1106 Family
The 4415122 is a fuel water separator. Its job is to remove water and bulk particulate from fuel before the final filter, using a coalescing element with an integral drain. It protects the injection system from water, which the final-stage filter is not designed to strip on its own.
Sellers call the same number a “fuel filter”, a “pre-fuel filter”, a “fuel filter/water separator” and a “water separator” — and one listing spells it “seperator”. The job does not change: this is the primary water-separating stage, and the fine filtration happens downstream in a separate element. The labels describe positions and duties that differ by build, so confirm the position you are servicing and the number on the old element; the label will not settle it.
This is the separator for the 1103, 1104 and 1106 Series. Perkins also carries a fuel water separator for the 1000 and 1100 Series — that is 26560145, a different element. If your engine is a 1004 or a 1006, you are more likely looking at that number than at this one. Confirm the family by serial before you order either.
4415122 Specifications
We publish only the fields that agree across listings. Outer diameter, height and weight are withheld: listings conflict on every one, and a copied figure is not evidence. Those values are confirmed against the manufacturer specification for your build and stated in your quotation.
| Check | What listings say | How to confirm |
|---|---|---|
| Engine-maker number | Perkins 4415122 | Check the Perkins parts record |
| Role | Primary fuel/water separator with integral drain; one listing says “kit” | Check the position you are servicing |
| Supersedes | 26550005 | Confirm in the Perkins parts record |
| Fleetguard cross-reference | FF5788 cited | Confirm against the build record |
| Outer diameter, height, weight | Not published | Confirmed per quotation |
Three Records That Have to Agree
Where the manual, the parts record and the old element disagree, send all three. A manual can print a number that was correct for a different build, or that has since been superseded. The element in your hand is evidence; the identification guide covers reading a worn number.
-
01
Engine build
Maker, model and full serial or build number.
-
02
Installed position
Which housing it came from, and whether a final-stage fuel filter sits downstream.
-
03
Complete old part number
The complete number on the removed element, including any suffix.
4415122 and the Numbers It’s Confused With
26550005 is the number 4415122 replaces. If your old element carries it, 4415122 is the current reference — confirm the build before assuming.
26560145 is the other Perkins fuel water separator, for the 1000 and 1100 Series. A different family, and the two are not interchangeable without a record check. If you are unsure which family your engine belongs to, send the serial and the old number rather than guessing.
4415105 is a nearby Perkins fuel-filter assembly that appears in the same 1103 and 1104 listings. Different number; confirm before treating it as related.
The supersession chain runs 26550005 → 4415122. If your old element carries the earlier number, the current reference is 4415122 — confirm the build before assuming.
Order the number you can evidence; accept a substitution only when the quotation names it.
4415122 Cross-References Are Candidates, Not Confirmations
| Brand | Candidate reference |
|---|---|
| Fleetguard | FF5788 |
| Baldwin | BF9915 |
| Donaldson | P502420 |
| Mann-Filter | P 8018 x |
| FG Wilson | 10000-63247 |
| Caterpillar | 2526338 |
| Massey Ferguson | 4225526M1 |
| Landini / McCormick | 710855A1 |
| Terex | 0745010165 |
| Wacker | 1000231433 |
| Marapco | 5310-5001-2 |
Candidate references only. Lists differ between sellers, and equipment-brand numbers vary by region; confirm against the engine record.
Applications, and How a 4415122 Order Is Quoted
Start with the engine, not the vehicle.
Perkins 1103 / 1104 / 1106 Series
Applications are engine-led: Perkins 1103, 1104 and 1106 Series engines in generator sets, agricultural machinery, plant and marine duty. The same element appears on equipment lists under Massey Ferguson, Landini, McCormick, Caterpillar and FG Wilson generator numbering; confirm those on the machine’s own record, not on the filter’s.
Industrial cross-references also require a check against the machine’s parts record.
Know exactly what is being quoted.
We check each line against the parts record and position, then state the offered item, maker, complete number, quantity and delivery terms.
No real-time stock feed is published; availability is confirmed against your list.
Request a QuoteFrequently Asked Questions
What is a Perkins 4415122 fuel water separator?
A Perkins fuel water separator — the pre-fuel water-removing stage — listed for 1103, 1104 and 1106 Series engines. The bare number is ambiguous, so always pair it with “Perkins fuel water separator” when searching or ordering.
What does Perkins 4415122 replace?
It supersedes 26550005. If your old element carries that number, confirm the build and the position before assuming 4415122 is the current reference.
Is 4415122 a fuel filter or a water separator?
It is the water-separating pre-filter. The final-stage fuel filter is a separate element. Sellers use both labels for the same part; the job is water separation at the primary stage.
What is the difference between 4415122 and 26560145?
Different engine families. 4415122 serves the 1103, 1104 and 1106 Series; 26560145 serves the 1000 and 1100 Series. Confirm the family by serial before ordering.
Confirm the Number, Then Confirm the Build
The 4415122 is quoted against a build, a position and a number, in that order. Send engine model, build number, old filter number, quantity and destination.