Quick answer:
The Kubota ZD326 tractor primary engine air filter part number found is K3181-82240. Filter dimensions found include Height: 9.75 in / 248 mm; Outer diameter: 4.5 in / 114 mm; Inner diameter: 2.5 in / 64 mm. Service guidance is to check the air filter every 200 hours.
Primary air filterK3181-82240
Filter height9.75 in / 248 mm
Engine power26.5 hp
Service intervalCheck every 200 hours
Kubota ZD326 Air Filter Specs
| Primary air filter part number | K3181-82240 |
|---|---|
| Secondary / safety air filter | 55231-26150 |
| Air filter size | Height: 9.75 in / 248 mm; Outer diameter: 4.5 in / 114 mm; Inner diameter: 2.5 in / 64 mm |
| Filter height | 9.75 in / 248 mm |
| Outer diameter | 4.5 in / 114 mm |
| Inner diameter | 2.5 in / 64 mm |
| Replacement interval | Check every 200 hours |
| Number of air filter elements | 3 elements (primary, secondary, pre-filter) |
| Engine model | Kubota D1005 model |
| Engine horsepower | 26.5 hp |
| Engine displacement | 61.1 cu in (1 L) |
Kubota ZD326 Air Filter Charts
Air filter dimensions
Engine horsepower
Engine displacement
Air filter service interval
Kubota ZD326 Air Filter FAQ
| What air filter does the Kubota ZD326 use? | The primary engine air filter part number found for the Kubota ZD326 is K3181-82240. |
|---|---|
| What size is the Kubota ZD326 air filter? | The air filter dimensions found for the Kubota ZD326 are Height: 9.75 in / 248 mm; Outer diameter: 4.5 in / 114 mm; Inner diameter: 2.5 in / 64 mm. Use these dimensions as a fit check, but treat the part number as the main match. |
| How often should the Kubota ZD326 air filter be checked or replaced? | The service guidance found for the Kubota ZD326 is to check the air filter every 200 hours. That is longer than the reference average of 50 hours for this class, so still shorten the interval when the machine is used in heavy dust. |
| How many air filter elements are listed for the Kubota ZD326? | This page lists 3 elements (primary, secondary, pre-filter). That means the safety element should be treated separately from the outer primary air filter. |
| Why include engine specs on a Kubota ZD326 air filter page? | Engine specs found for the Kubota ZD326 include 26.5 hp, 61.1 cu in (1 L). Those specs help identify the tractor class, but the air filter should still be matched by part number K3181-82240. |
| Should I order the Kubota ZD326 air filter by size or part number? | Buy by K3181-82240 first for the Kubota ZD326. The dimensions value is useful for checking an aftermarket listing before ordering. |
| What should I confirm before buying a Kubota ZD326 air filter? | For the Kubota ZD326, confirm K3181-82240 against the Kubota parts source and use the listed dimensions of Height: 9.75 in / 248 mm; Outer diameter: 4.5 in / 114 mm; Inner diameter: 2.5 in / 64 mm as a physical check. |
Official information note
Air filter fit can change by engine, serial number, production year and air-cleaner housing. Check the operator manual, parts manual and official kubotausa.com website before buying or fitting an air filter.

