The John Deere F620 deck belt part number found is M136819. The deck belt size found is 137.6 in (3,495 mm) long by 0.5 in (13 mm) wide. The drive belt part number found is AM131202.
John Deere F620 Belt Size and Part Numbers
| Mower deck belt part number | M136819 |
|---|---|
| Mower deck belt length | 137.6 in (3,495 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt part number | AM131202 |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere F620 Belt Notes
| Mower deck belt note | The John Deere F620 deck belt listing shows part number M136819, length 137.6 in (3,495 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 |
|---|---|
| Drive belt note | The John Deere F620 drive or transmission belt part number captured here is AM131202. This is separate from the mower deck belt |
| Fitment note | Before ordering a John Deere F620 belt, compare the old belt routing, pulley layout and deck size if available. A close-looking belt can still be wrong |
John Deere F620 Belt Size FAQ
What should you watch when fitting a 137.6 in (3,495 mm) deck belt on the John Deere F620?
A 137.6 in (3,495 mm) deck belt leaves little room for sloppy routing. This is a very long belt run, so pulley alignment, belt keepers and idler tension matter a lot. Long belts punish sloppy routing fast. Before blaming the new belt, compare the belt path to the routing decal and make sure it sits on the correct side of each keeper
Can you replace the John Deere F620 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
How do you avoid mixing up the John Deere F620 deck and drive belts?
Use the belt position first: deck belt part number M136819 and drive belt part number AM131202. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
What is the risk with the John Deere F620 drive belt part number?
The captured drive belt number is AM131202. 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.
