The published Toro Z257 lawn tractor/ride-on mower accessory drive pump belt 5 rib belt / .687 wide x 57.19 long size is 17.5mm The recorded OEM references are 1-633749.
Belt replacement guide
Toro Z257 belt size & replacement chart
OEM references, belt positions and published dimensions for this lawn tractor / ride-on mower.
Match the belt function first, then confirm the OEM number and size.
Belt application
OEM / replacement number
Published size
Listing SKU
Drive Accessory Drive Pump Belt 5 Rib Belt / .687 Wide x 57.19 Long
1-633749
17.5mm
BEL7525
Application details
Toro Z257 belt details
Accessory Drive Pump Belt 5 Rib Belt / .687 Wide x 57.19 Long
Recorded OEM reference: 1-633749. Published size: 17.5mm
Important: Confirm the belt position, deck size, serial range and machine configuration before ordering. Belts with the same length can use different widths or profiles.
Common questions
Toro Z257 belt FAQ
What belt does the Toro Z257 use?
The listed belt application is Accessory Drive Pump Belt 5 Rib Belt / .687 Wide x 57.19 Long. Recorded OEM reference: 1-633749.
What is the Toro Z257 belt part number?
The recorded OEM reference is 1-633749. Match it to the correct belt position before ordering.
What size belt does the Toro Z257 use?
Accessory Drive Pump Belt 5 Rib Belt / .687 Wide x 57.19 Long: 17.5mm
Can I match the Toro Z257 belt by length alone?
No. Width, profile, inside or outside circumference, belt position and OEM reference can all affect fitment. Match the belt function and OEM number first, then use the dimensions as a final check.
