The John Deere LTR166 tractor primary engine air filter part number found is AT311066. Filter dimensions found include Outer diameter: 12.06 in / 306 mm; Inner diameter: 7.75 in / 197 mm.
Primary air filterAT311066
Filter sizeOuter diameter: 12.06 in / 306 mm
John Deere LTR166 Air Filter Specs
Primary air filter part number
AT311066
Pre-filter
M77555
Air filter size
Outer diameter: 12.06 in / 306 mm; Inner diameter: 7.75 in / 197 mm
Outer diameter
12.06 in / 306 mm
Inner diameter
7.75 in / 197 mm
Number of air filter elements
2 elements (primary, pre-filter)
John Deere LTR166 Air Filter Charts
Air filter dimensions
Outer diameter
12.06 in
Inner diameter
7.75 in
John Deere LTR166 Air Filter FAQ
What air filter does the John Deere LTR166 use?
The primary engine air filter part number found for the John Deere LTR166 is AT311066.
What size is the John Deere LTR166 air filter?
The air filter dimensions found for the John Deere LTR166 are Outer diameter: 12.06 in / 306 mm; Inner diameter: 7.75 in / 197 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 LTR166?
This page lists 2 elements (primary, pre-filter). The pre-filter is separate from the main paper element and should not be confused with the primary filter number.
Should I order the John Deere LTR166 air filter by size or part number?
The part number AT311066 matters more than size alone on the John Deere LTR166. The listed dimensions helps confirm the filter looks physically consistent.
What should I confirm before buying a John Deere LTR166 air filter?
For the John Deere LTR166, confirm AT311066 against John Deere parts information and use the listed dimensions of Outer diameter: 12.06 in / 306 mm; Inner diameter: 7.75 in / 197 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.
