Description
AF55020 Air Filter for Cummins QSF/QSB Compact Diesel Engines
Replacement air filter for Cummins QSF 3.8, QSB 4.5, and QSF 2.8 compact diesel engines — commonly found in skid steers, compact track loaders, telehandlers, and small excavators. Radial seal design prevents dust bypass in harsh construction environments.
Key Features
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Radial Seal Design: Positive sealing prevents unfiltered air bypass
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Compact Engine Fitment: Sized for QSF and QSB 4.5 platforms
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All-Makes Cross-Reference: Replaces Fleetguard, Donaldson, and multiple OEM numbers
Compatibility
| Engine |
Tier |
Applications |
| Cummins QSF 3.8 |
Tier 4 Final |
Skid steers, compact loaders, forklifts |
| Cummins QSB 4.5 |
Tier 4 Final |
Telehandlers, small excavators, pumps |
| Cummins QSF 2.8 |
Tier 4 (NA) |
Compact equipment, welders, light towers |
Cross-Reference
| Brand |
Part Number |
| Cummins/Fleetguard |
AF55020 |
| Donaldson |
PA31004 |
| OEM |
70024177, 46595499, 5283826 |
Frequently Asked Questions
Q: Will this fit my JCB skid steer?
A: If your machine uses the Cummins radial seal housing, yes. Verify your existing filter.
Q: Can I use in high-dust environments?
A: Yes, but expect more frequent changes. Add a pre-cleaner for extreme dust.
Q: How do I know when to change?
A: Most equipment has a restriction indicator. Replace when it shows red.
Q: Oiled cotton vs this filter?
A: For silica dust in construction, dry cellulose provides more consistent filtration.
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