The MF 390 uses the same dry-type two-stage air cleaner housing as the MF 265 and MF 290. The Perkins A4.248 breathes through the same filter elements across all three models.
Outer element: OEM 1447082M91. Primary filtration. Service interval: 500 hours or when the restriction indicator on the intake pipe shows red. In harvesting or tillage work with high dust loads, inspect every 50-100 hours.
Inner safety element: OEM 1860841M1. Replace at every third outer element change. This element is your last line of defence — it must never be cleaned or reused.
Inspection after cleaning: After tapping out the outer element, hold it up to a light source and rotate it. Any pinhole or crack means discard and replace — do not reinstall a compromised element. The cost of an element is trivial compared to a rebore.
Pre-cleaner maintenance: If your MF 390 has a pre-cleaner bowl or vortex unit, empty and clean it at every engine oil change. A full pre-cleaner passes dust directly to the paper element and collapses service intervals.
Cross-Reference Table
| Supplier | Part Number | Fit | Notes | |
|---|---|---|---|---|
| Wix | 46349 | Drop-in | Outer element — 1447082M91 | |
| Baldwin | RS3544 | Drop-in | Outer element | |
| Donaldson | P182047 | Drop-in | Outer element | |
| Wix | 46350 | Drop-in | Inner safety element — 1860841M1 | |
| Baldwin | RS3545 | Drop-in | Inner safety element |
Specifications
- Change interval
- Outer: 500 hours or restriction indicator. Inner: every 3rd outer change.
- Notes
- Inspect outer element against light before reuse. Never clean or reuse inner safety element. Service pre-cleaner at every oil change.
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