The high-pressure common rail system on a 6.7L Cummins operates under extreme pressures, where even tiny particulates cause premature injector wear and fuel pump damage. Replacing your 6.7 cummins fuel filter with a factory-spec Fleetguard FF5612 keeps the fuel supply clean and protects fuel system components.
Below are the detailed specifications for Fleetguard FF5612 (Cummins OEM part numbers 4989106 و 5404943), replacement cross-references, and step-by-step service instructions.
Technical Specifications: 6.7 Cummins Fuel Filter FF5612
The FF5612 uses synthetic StrataPore media, rated at 5.80 microns at 98% efficiency to handle high flow rates without collapsing.
| Specification Property | Imperial Value | Metric Value |
| Thread Size | M20 X 1.5-6H INT | M20 X 1.5-6H INT |
| Gasket Outside Diameter | 2.83 in | 71.88 mm |
| Gasket Inside Diameter | 2.46 in | 62.48 mm |
| Largest Outside Diameter | 3.68 in | 93.47 mm |
| الارتفاع | 6.95 in | 176.53 mm |
| Standpipe | NO | NO |
| Media Type | StrataPore | StrataPore |
| Primary Particle Efficiency | 5.80 micron (c) @ 98% | 5.80 micron (c) @ 98% |
| Applicable Regions | Global (North America, China, Europe, South America, SEA, APAC, Mexico) |
6.7 Cummins Fuel Filter Part Number Cross Reference
Cross-check your current housing or OE manual with these part numbers before ordering:
- Fleetguard Part Number: FF5612
- Cummins OE Part Numbers: 4989106, 5404943
Common Service Questions & Practical Tips
How to change fuel filter on 6.7 Cummins
- Place a drain pan under the housing and open the valve to clear out trapped fuel.
- Spin off the filter housing/canister counterclockwise.
- Wipe down the mounting face, apply a thin coat of clean fuel to the new gasket on the Fleetguard FF5612, and thread it on by hand until it makes contact.
- Turn it an extra 3/4 to 1 full turn to seat the seal correctly.
What size socket for fuel filter on 6.7 Cummins?
- Under-hood filter cap: Requires a 28 mm أو 1-1/8 inch socket.
- Rear frame-mounted water separator: Fits a 1-1/8 inch socket or standard filter strap wrench depending on the truck year.
How to prime 6.7 Cummins after fuel filter change
Never pre-fill the fuel filter with raw diesel. Doing so bypasses the filter media and routes unfiltered fuel directly into the injectors.
- Turn the ignition key to RUN (do not crank) for 20–30 seconds. Listen to the electric lift pump running.
- Turn the key back to OFF.
- Repeat this key cycle 3 to 5 times. You will hear the pump pitch change once the canister is fully purged of air.
- Crank the engine and check for leaks around the gasket.
Verify Fitment with YIZHI POWER
Filter setups vary between Dodge Ram applications, industrial equipment, and generator sets. If you need to confirm whether FF5612, 4989106, or 5404943 fits your engine:
- Locate your Cummins Engine Serial Number (ESN) on the engine tag.
- اتصل بنا ييتشي باور.
- We will check the factory catalog to confirm the right part number free of charge.
Contact YIZHI POWER on WhatsApp (+86 18671978898) for pricing, global shipping, and technical support.
