Description
Premium aftermarket replacement secondary air filter from Fleetguard. The AF25263 is a Magnum RS radial seal safety element that installs inside the primary filter as the last line of defense if the primary is damaged or during servicing. It replaces Caterpillar 106-3973 and pairs with the AF25262 primary on Cat excavators, wheel loaders, dozers and off-highway trucks.
Specifications
| Manufacturer | Fleetguard |
|---|---|
| Part Number | AF25263 |
| Part Type | Secondary (Safety) Air Filter, Magnum RS Radial Seal, Round |
| Engine Compatibility | Caterpillar C13, C15, C18, C27, C32 and legacy 3116 through 3512 |
| Outside Diameter | 8.66 in (220.0 mm) |
| Inside Diameter | 7.01 in (178 mm) |
| Height | 17.72 in (450 mm) |
| Media | Cellulose |
| Matching Primary Element | AF25262 (Caterpillar 106-3969) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Caterpillar: 106-3973
- Donaldson: P533884
- Baldwin: RS3701
- Wix: 46747
- Luber-finer: LAF3884
- Hastings: AF2369
- Mann: CF23398
Applications
This secondary air filter fits Caterpillar engines found in:
- Cat excavators 345B, 345C, 345D, 349D, 365B, 365C, 385B, 385C, 390D
- Cat wheel loaders 824H, 825H, 826H, 834H, 836H, 980H, 988H, 993K
- Cat track-type tractors D9, D10R, D10N, D11R, D11T
- Cat off-highway trucks 776C, 776D, 777B, 777C, 777D, 777E
- Cat compactors and scrapers 631D, 631G, 637G, 657E, 657G
- Atlas Copco drill rigs
Verify fitment with your VIN or engine serial number and configuration before ordering. This is the SECONDARY (inner safety) element, not the primary — the primary is AF25262 and is sold separately. A safety element is normally replaced every second or third primary change, or any time the primary is found damaged.
