The MF 255 Perkins AD4.212 uses the same two-stage fuel filtration system as the rest of the Perkins 4-cylinder MF range.
Primary filter: OEM 1447082M1. Pre-sediment inline filter protecting the lift pump. Replace every 400 hours or at first sign of contamination in the bowl.
Secondary filter: OEM 3637380M1. Final-stage protection for the injection pump. Replace every 200 hours.
Injection pump note: The AD4.212 turbo uses a CAV rotary injection pump. These pumps are precision-machined and are not tolerant of water or contamination. If you notice difficulty starting, rough idle, or black smoke, inspect the fuel system before assuming a turbo or mechanical issue.
Bleeding: After filter replacement, loosen the secondary filter head bleed screw, prime with the hand pump until air-free fuel flows, retighten, and start. If the engine fires but stalls, bleed the injector lines individually by loosening each union 1 turn, cranking for 3–4 seconds, then retightening.
Cross-Reference Table
| Supplier | Part Number | Fit | Notes | |
|---|---|---|---|---|
| Wix | 33117 | Drop-in | Primary inline — 1447082M1 | |
| Baldwin | BF7632 | Drop-in | Primary inline | |
| Fram | P4003 | Drop-in | Primary inline | |
| Donaldson | P551010 | Drop-in | Primary inline | |
| Fleetguard | FF5018 | Drop-in | Primary inline | |
| Mann | WK 940/13 | Drop-in | EU market |
Specifications
- Change interval
- Secondary: 200 hours. Primary: 400 hours or as needed.
- Notes
- CAV rotary injection pump — protect from water and contamination. Bleed air after any filter replacement.
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