The John Deere 6R 120 tractor primary engine air filter part number found is RE164839. Filter dimensions found include Inner diameter: 6.78 in / 172 mm. Service guidance is to replace the air filter every 500 hours.
Primary air filterRE164839
Filter sizeInner diameter: 6.78 in / 172 mm
Engine power118 hp
Service intervalReplace every 500 hours
John Deere 6R 120 Air Filter Specs
Primary air filter part number
RE164839
Secondary / safety air filter
AN403919
Air filter size
Inner diameter: 6.78 in / 172 mm
Inner diameter
6.78 in / 172 mm
Replacement interval
Replace every 500 hours
Number of air filter elements
2 elements (primary, secondary)
Engine horsepower
118 hp
Engine displacement
274.6 cu in (4.5 L)
John Deere 6R 120 Air Filter Charts
Air filter dimensions
Inner diameter
6.78 in
Engine horsepower
This model
118 hp
Average
35 hp
Low
18 hp
High
66 hp
Engine displacement
This model
274.6 cu in
Average
100 cu in
Low
50 cu in
High
180 cu in
Air filter service interval
This model
500 hr
Average
100 hr
Low
50 hr
High
200 hr
John Deere 6R 120 Air Filter FAQ
What air filter does the John Deere 6R 120 use?
The primary engine air filter part number found for the John Deere 6R 120 is RE164839.
What size is the John Deere 6R 120 air filter?
The air filter dimensions found for the John Deere 6R 120 are Inner diameter: 6.78 in / 172 mm. Use these dimensions as a fit check, but treat the part number as the main match.
How often should the John Deere 6R 120 air filter be checked or replaced?
The service guidance found for the John Deere 6R 120 is to replace the air filter every 500 hours. That is longer than the reference average of 100 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 John Deere 6R 120?
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 6R 120 air filter page?
Engine specs found for the John Deere 6R 120 include 118 hp, 274.6 cu in (4.5 L). Those specs help identify the tractor class, but the air filter should still be matched by part number RE164839.
Should I order the John Deere 6R 120 air filter by size or part number?
The part number RE164839 matters more than size alone on the John Deere 6R 120. The listed dimensions helps confirm the filter looks physically consistent.
What should I confirm before buying a John Deere 6R 120 air filter?
For the John Deere 6R 120, confirm RE164839 against John Deere parts information and use the listed dimensions of Inner diameter: 6.78 in / 172 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.
