The John Deere D125 deck belt part number found is GY20072. The deck belt length found is 42 in (1,067 mm). The drive belt part number found is GX20006.
John Deere D125 Belt Size and Part Numbers
| Mower deck belt part number | GY20072 |
|---|---|
| Mower deck belt length | 42 in (1,067 mm) |
| Drive belt part number | GX20006 |
Belt Size Comparison Chart
Belt length comparison
John Deere D125 Belt Notes
| Mower deck belt note | The John Deere D125 deck belt listing shows part number GY20072 with length 42 in (1,067 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere D125 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 | Belts are cheap until you buy the wrong one twice. On the John Deere D125, confirm belt route, old belt label and OEM part number before ordering |
John Deere D125 Belt Size FAQ
Is a close belt length good enough for the John Deere D125 deck?
The deck belt length found is 42 in (1,067 mm). Close is not the same as correct. A belt that is slightly short can overload bearings, while one slightly long can slip or fail to engage the blades cleanly
How do you avoid mixing up the John Deere D125 deck and drive belts?
Use the belt position first: deck belt part number GY20072 and drive belt part number GX20006. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
What should you double-check with the John Deere D125 deck belt part number?
The captured deck belt number is GY20072. Because the width is missing here, check the old belt label, deck tag or parts diagram before trusting a non-OEM cross-reference
What is the risk with the John Deere D125 drive belt part number?
The captured drive belt number is GX20006. If the length and width are missing, a cheap cross-reference can still be wrong even when it claims to replace the OEM belt
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.
