Quick answer:
The John Deere 840 tractor primary engine air filter part number found is AT75035. Filter dimensions found include Inner diameter: 13 in / 330 mm.
Primary air filterAT75035
Filter sizeInner diameter: 13 in / 330 mm
Engine power37.5 hp
John Deere 840 Air Filter Specs
| Primary air filter part number | AT75035 |
|---|---|
| Secondary / safety air filter | AN403919 |
| Air filter size | Inner diameter: 13 in / 330 mm |
| Inner diameter | 13 in / 330 mm |
| Number of air filter elements | 2 elements (primary, secondary) |
| Engine horsepower | 37.5 hp |
| Engine displacement | 177 cu in (2.9 L) |
John Deere 840 Air Filter Charts
Air filter dimensions
Engine horsepower
Engine displacement
John Deere 840 Air Filter FAQ
| What air filter does the John Deere 840 use? | The primary engine air filter part number found for the John Deere 840 is AT75035. |
|---|---|
| What size is the John Deere 840 air filter? | The air filter dimensions found for the John Deere 840 are Inner diameter: 13 in / 330 mm. Use these dimensions as a fit check, but treat the part number as the main match. |
| How many air filter elements are listed for the John Deere 840? | This page lists 2 elements (primary, secondary). That means the safety element should be treated separately from the outer primary air filter. |
| Why include engine specs on a John Deere 840 air filter page? | For the John Deere 840, the engine specs found are 37.5 hp, 177 cu in (2.9 L). This is useful context when comparing similar models, but not a substitute for checking the filter number AT75035. |
| Should I order the John Deere 840 air filter by size or part number? | Buy by AT75035 first for the John Deere 840. The dimensions value is useful for checking an aftermarket listing before ordering. |
| What should I confirm before buying a John Deere 840 air filter? | For the John Deere 840, confirm AT75035 against John Deere parts information and use the listed dimensions of Inner diameter: 13 in / 330 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 deere.com website before buying or fitting an air filter.

