The John Deere LTR166 deck belt part number found is M144202. The deck belt size found is 144 in (3,658 mm) long by 0.5 in (13 mm) wide.
John Deere LTR166 Belt Size and Part Numbers
| Mower deck belt part number | M144202 |
|---|---|
| Mower deck belt length | 144 in (3,658 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere LTR166 Belt Notes
| Mower deck belt note | The John Deere LTR166 deck belt listing shows part number M144202, length 144 in (3,658 mm) and width 0.5 in (13 mm). Use the listed value as a buying guide, not a blind substitute for the deck-specific parts diagram |
|---|---|
| Fitment note | For the John Deere LTR166, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere LTR166 Belt Size FAQ
Why can the correct John Deere LTR166 deck belt still slip?
The deck belt length found is 144 in (3,658 mm). Even with the right length, a weak idler spring, worn pulley groove or wrong belt path can make it slip. The part number and routing matter together
Can you replace the John Deere LTR166 belt with the same length but different width?
The deck belt width found is 0.5 in (13 mm). That is the common 1/2-inch belt width range. Still match the OEM number because the belt angle, fabric wrap and effective length can differ. A belt with the wrong top width can ride too high or too low in the pulley even if the length looks right
Mistakes do happen. Belt specs can change by year, mower deck, pulley layout, serial range and regional parts catalog. Please check the operator manual, belt routing decal, old belt label and official John Deere parts catalog before ordering a replacement belt.
