The Kubota Z251BR deck belt part number found is 77700-05581. The drive belt part number found is 70000-73764. The drive belt size found is 95 in (2,413 mm) long by 0.5 in (13 mm) wide.
Kubota Z251BR Belt Size and Part Numbers
| Mower deck belt part number | 77700-05581 |
|---|---|
| Drive belt part number | 70000-73764 |
| Drive belt length | 95 in (2,413 mm) |
| Drive belt width | 0.5 in (13 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
Kubota Z251BR Belt Notes
| Mower deck belt note | The Kubota Z251BR deck belt part number captured here is 77700-05581. Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The Kubota Z251BR drive or transmission belt listing shows part number 70000-73764, length 95 in (2,413 mm) and width 0.5 in (13 mm). 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 Kubota Z251BR, confirm belt route, old belt label and OEM part number before ordering |
Kubota Z251BR Belt Size FAQ
Why can the correct Kubota Z251BR drive belt still not pull properly?
The drive belt length found is 95 in (2,413 mm). If the tractor still slips, the belt may be routed wrong, the idler may be weak, or the pulley faces may be polished. Length alone does not fix a worn drive system
Why does 0.5 in (13 mm) belt width matter on the Kubota Z251BR?
The captured drive 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
How do you avoid mixing up the Kubota Z251BR deck and drive belts?
Use the belt position first: deck belt part number 77700-05581 and drive belt part number 70000-73764. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
Is the captured Kubota Z251BR deck belt part number enough to buy from?
The captured deck belt number is 77700-05581. This number helps with OEM lookup, but the deck belt length and width were not fully captured here. Before buying aftermarket, confirm the exact deck or serial range
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 kubotausa.com before ordering a replacement belt.
