The John Deere 4440 tractor primary engine air filter part number found is RE20250.
Primary air filterRE20250
Engine power155 hp
John Deere 4440 Air Filter Specs
Primary air filter part number
RE20250
Number of air filter elements
1 element (primary)
Engine horsepower
155 hp
Engine displacement
463.8 cu in (7.6 L)
John Deere 4440 Air Filter Charts
Engine horsepower
This model
155 hp
Average
35 hp
Low
18 hp
High
66 hp
Engine displacement
This model
463.8 cu in
Average
100 cu in
Low
50 cu in
High
180 cu in
John Deere 4440 Air Filter FAQ
What air filter does the John Deere 4440 use?
The primary engine air filter part number found for the John Deere 4440 is RE20250.
How many air filter elements are listed for the John Deere 4440?
This page confirms 1 element (primary). No separate safety or pre-filter part number was found for this model, so inspect the actual air-cleaner housing before assuming it uses only one piece.
Why include engine specs on a John Deere 4440 air filter page?
Engine specs found for the John Deere 4440 include 155 hp, 463.8 cu in (7.6 L). Those specs help identify the tractor class, but the air filter should still be matched by part number RE20250.
Should I order the John Deere 4440 air filter by size or part number?
Start with RE20250 when buying an air filter for the John Deere 4440. Do not rely only on the model name if there were production changes.
What should I confirm before buying a John Deere 4440 air filter?
For the John Deere 4440, confirm RE20250 against the parts manual or official John Deere lookup because air-cleaner parts can change by serial range.
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.
