The Toro 400 lawn tractor/ride-on mower uses five published belt sizes: 1/2" Wide x 84" I.D. for the cutter deck belt, 5/8" Wide x 128" I.D. for the cutter deck belt, 1/2" Wide x 87" I.D. for the cutter deck belt, 1/2" Wide x 105" I.D. for the PTO to cutter deck belt, and 1/2" Wide x 96" I.D. for the PTO to cutter deck belt. Match each belt to its correct position and OEM reference before ordering.
Belt replacement guide
Toro 400 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
Mower deck Cutter Deck Belt
6738
1/2" Wide x 84" I.D.
BEL6886
Mower deck Cutter Deck Belt
112449
5/8" Wide x 128" I.D.
BELB128
Mower deck Cutter Deck Belt
106125
1/2" Wide x 87" I.D.
BEL6889
PTO PTO To Cutter Deck Belt
102742
1/2" Wide x 105" I.D.
BELA105
PTO PTO To Cutter Deck Belt
108834
1/2" Wide x 96" I.D.
BEL6898
Application details
Which Toro 400 belt do you need?
Cutter Deck Belt
Recorded OEM reference: 6738. Published size: 1/2" Wide x 84" I.D.
Cutter Deck Belt
Recorded OEM reference: 112449. Published size: 5/8" Wide x 128" I.D.
Cutter Deck Belt
Recorded OEM reference: 106125. Published size: 1/2" Wide x 87" I.D.
PTO To Cutter Deck Belt
Recorded OEM reference: 102742. Published size: 1/2" Wide x 105" I.D.
PTO To Cutter Deck Belt
Recorded OEM reference: 108834. Published size: 1/2" Wide x 96" I.D.
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 400 belt FAQ
What belt does the Toro 400 use?
The listed belt applications are Cutter Deck Belt, Cutter Deck Belt, Cutter Deck Belt, PTO To Cutter Deck Belt, and PTO To Cutter Deck Belt. Recorded OEM references: 6738, 112449, 106125, 102742, and 108834.
What are the Toro 400 belt part numbers?
The recorded OEM references are 6738, 112449, 106125, 102742, and 108834. Match each number to the correct belt position before ordering.
What belt sizes does the Toro 400 use?
Cutter Deck Belt: 1/2" Wide x 84" I.D., Cutter Deck Belt: 5/8" Wide x 128" I.D., Cutter Deck Belt: 1/2" Wide x 87" I.D., PTO To Cutter Deck Belt: 1/2" Wide x 105" I.D., and PTO To Cutter Deck Belt: 1/2" Wide x 96" I.D.
Why are multiple belts listed for the Toro 400?
This machine has 5 recorded belt applications. Different belts can operate the mower deck, transmission, PTO, clutch or other drive components.
Can I match the Toro 400 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.
