Product Overview
Fleetguard AF4259 Secondary Air Filter
Genuine Fleetguard AF4259 axial-seal secondary air filter is designed to provide an additional level of engine protection behind the primary air element in compatible air-cleaner systems. The AF4259 uses cellulose filtration media and an axial-seal design to help reduce the risk of airborne contaminants reaching the clean side of the intake system. It cross-references Donaldson P959184, Baldwin PA30268, NAPA 500561, Wix WA10561, Carquest 93981, and additional equipment manufacturer part numbers listed below.
Fleetguard AF4259 Air Filter Cross References
| Manufacturer or Brand | AF4259 Cross-Reference Part Number |
|---|---|
| Fleetguard | AF4259 |
| Donaldson | P959184 |
| Baldwin | PA30268 |
| NAPA | 500561 |
| Wix | WA10561 |
| Carquest | 93981 |
| Case IH | 73337833 |
| Liebherr | 12265206 |
| New Holland | 73337833 |
| Wirtgen | 2357877 |
| Caterpillar | 3466694 |
| Fendt | H737200092110 |
Genuine Fleetguard AF4259 Filter Features
- Secondary air filtration: Genuine Fleetguard AF4259 serves as a secondary or safety element behind the primary air filter in compatible air-cleaner systems.
- Axial-seal design: Uses an axial sealing configuration designed to maintain a proper seal and help reduce unfiltered-air bypass.
- Cellulose filter media: Uses cellulose media engineered around filtration characteristics including fiber size, pore structure, thickness, and mechanical strength.
- Additional engine protection: Helps protect the clean side of the intake system if the primary element is damaged, disturbed, or removed for servicing.
- Outside-in airflow: Designed with an outside-to-inside airflow direction in compatible air-cleaner assemblies.
Fleetguard AF4259 Air Filter Specifications
| Filter Specification | Measurement or Value |
|---|---|
| Filter Type | Secondary / safety air filter |
| Seal Type | Axial seal |
| Media Type | Cellulose |
| Flow Direction | Outside In |
| Overall Length | 11.65 in / 295.80 mm |
| Overall Width | 6.57 in / 167.00 mm |
| Overall Height | 1.50 in / 38.00 mm |
| Rated Flow | 3,698.80 gpm / 14,000.00 L/min (14.00 m³/min) |
| Full Life Efficiency | 95% |
Cross-reference numbers are provided for identification purposes. Always verify filter compatibility using the original filter part number, equipment model, engine, air-cleaner housing, primary and secondary filter configuration, dimensions, and specifications before placing an order.
⚠️ California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
