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Cummins Fuel Filters
Fleetguard FF5636 Fuel Filter
A spin-on fuel element listed for Cummins ISC 8.3 L and ISL 8.9 L engines. Confirm the build, installed position and old part number before ordering.
- Part number
- FF5636
- Type
- Spin-on fuel element
- Engine reference
- Cummins 4940647 (to be confirmed)
Availability and delivery terms confirmed with quotation.
Confirm the position, not just the number
The FF5636 is a spin-on fuel element, with the element and housing combined in one canister. It is listed for the engine-side fuel position on Cummins ISC and ISL builds, downstream of the water separator.
Catalogues disagree on whether to call it a primary or secondary filter. Confirm the installed position and complete old part number against your engine build before ordering.
Engine model & build
Provide the engine maker, model and full serial or build number. The model name alone does not confirm fitment.
Installed filter position
Identify the filter head it came from and whether a water separator sits upstream.
Complete old part number
Send the full number printed on the removed element, including any suffix. If the records disagree, send all three for review.
FF5636 Specifications
We publish only the interface fields that agree across listings. Height, outside diameter and micron rating are withheld: listings conflict, and a copied figure is not evidence. Those values are confirmed against the manufacturer specification for your build and stated in your quotation.
| Check | Value to compare | How to confirm |
|---|---|---|
| Thread | 7/8-14 UNF-2B | Match the old element |
| Gasket seat | 71.9 mm OD, 62.5 mm ID | Measure or match the old element |
| Standpipe | Not fitted | Check the filter head |
| Engine-maker number | 4940647 (5346642 also cited) | Check the build record |
| Height, outside diameter, micron rating | Not published | Confirmed per quotation |
Swipe horizontally to view all columns.
FF5636 Cross-References
| Brand | Candidate reference |
|---|---|
| Cummins | 4940647 |
| Baldwin | BF7924 |
| Donaldson | P550879 |
| WIX | 33936 |
| NAPA | 3936 |
| Fram | P10780 |
| Luber-Finer | LFF5488 |
Candidate references only. Lists differ; confirm against the engine record.
Applications & ordering
Start with the engine, not the vehicle.
Cummins ISC 8.3 L / ISL 8.9 L
Listed applications include trucks, buses, motorhomes, generator sets and plant. Equipment type helps narrow the search; the engine build and installed filter position determine the match.
Industrial cross-references also require a check against the machine’s parts record.
Know exactly what is being quoted.
Each line is checked against the parts record and filter position. Your quotation states the offered item, maker, complete part number, quantity and delivery terms.
Availability is confirmed against your list. No real-time stock feed is published.
Request a QuoteFrequently Asked Questions
Is the FF5636 a primary or a secondary fuel filter?
Both labels appear. Manufacturer-side ISC and ISL listings call it secondary; some parts data calls it primary. Confirming the position and old number is more reliable than choosing a label.
What is the difference between FF5636 and FF5813?
Same thread and envelope, different media. FF5813 is listed as the advanced-efficiency version; confirm which number is being quoted.
What Cummins number matches FF5636?
4940647 is most often cited for the same position; 5346642 also appears. Check both against the build record.
Is FF5636 a fuel/water separator?
No. It's a fuel element. The separator stage is a separate part with a drain or sensor, and some service sets include both.
Confirm the number. Then confirm the build.
Send engine model, build number, old filter number,
quantity and destination.