The deck belt length found is 137.6 in (3,495 mm). The drive belt size found is 108 in (2,743 mm) long by 1 in (25 mm) wide.
John Deere F687 Belt Size and Part Numbers
| Mower deck belt length | 137.6 in (3,495 mm) |
|---|---|
| Drive belt length | 108 in (2,743 mm) |
| Drive belt width | 1 in (25 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere F687 Belt Notes
| Mower deck belt note | The John Deere F687 deck belt measurement captured here is length 137.6 in (3,495 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere F687 drive or transmission belt measurement captured here is length 108 in (2,743 mm) and width 1 in (25 mm). Do not mix it up with the deck belt because the routing and job are different |
| Fitment note | For the John Deere F687, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere F687 Belt Size FAQ
Why can the correct John Deere F687 deck belt still slip?
The deck belt length found is 137.6 in (3,495 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
Should you buy the John Deere F687 belt by length only?
No. The drive belt width found is 1 in (25 mm). That is a heavy/wide belt size. Width matters here because a thinner substitute can lose grip, heat up or wear the pulley faces. Use length, width and OEM part number together where possible
Are the John Deere F687 deck and drive belt lengths close?
The deck belt is 137.6 in (3,495 mm) and the drive belt is 108 in (2,743 mm), about 29.6 in (752 mm) different. That is enough to treat them as separate belts when ordering
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.
