The John Deere L120 deck belt part numbers found are GX21833 and GX20571. The deck belt size found is 95 in (2,413 mm) long by 0.5 in (13 mm) wide. The drive belt part number found is GX20006.
John Deere L120 Belt Size and Part Numbers
| Mower deck belt part number | GX21833 and GX20571 |
|---|---|
| Mower deck belt length | 95 in (2,413 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt part number | GX20006 |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere L120 Belt Notes
| Mower deck belt note | The John Deere L120 deck belt listing shows part numbers GX21833 and GX20571, length 95 in (2,413 mm) and width 0.5 in (13 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere L120 drive or transmission belt part number captured here is GX20006. Do not mix it up with the deck belt because the routing and job are different |
| Fitment note | For the John Deere L120, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere L120 Belt Size FAQ
Why can the correct John Deere L120 deck belt still slip?
The deck belt length found is 95 in (2,413 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
Why does 0.5 in (13 mm) belt width matter on the John Deere L120?
The captured deck belt width is 0.5 in (13 mm). Pulley grooves are cut for a matching belt profile. Wrong width can cause squeal, heat, poor blade speed or fast belt wear
Why are there multiple belt part numbers for the John Deere L120?
The captured values separate the belt jobs: deck belt part numbers GX21833 and GX20571 and drive belt part number GX20006. Treat each number as position-specific and confirm it against the parts diagram before ordering
Is the captured John Deere L120 drive belt part number enough to buy from?
The captured drive belt number is GX20006. That is useful for OEM lookup, but the drive belt length and width were not fully captured here. It is weak data for guessing an aftermarket belt by size alone
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.
