Wheelhorse 312-8 axle pullley

[Caleb Jones 0]

Has anyone ever put a 4 inch pulley on the transaxle of a wheelhorse 312-8? I seem to struggle to find the right belt size. I believe the Kohler motor has a 4 inch and there was a 6 or 6.5 on the transaxle. Im thinking I need  a79 inch belt but I'm not sure. Does anyone know?

[Ed Kennell 42,466]

to the   Caleb

 

If your 312-8 has stock engine and transmission pulleys it should take a 5/8X82" belt.

If you want to increase the tractor speed by replacing the stock 7" pulley with a 4"pulley a shorter belt and possibly belt guard modifications may be required to permit proper belt stopping for gear shifting.         

 

I buy all my belts at TSC.    If they don't fit, you can exchange them for the correct belt. Just keep the belt and sleeve clean for a full refund.

 

 

Edited 9 hours ago by Ed Kennell

[oliver2-44 10,829]

3 hours ago, Ed Kennell said:

to the   Caleb

 

If your 313-8 has stock engine and transmission pulleys it should take a 5/8X82" belt.

If you want to increase the tractor speed by replacing the stock 7" pulley with a 4"pulley a shorter belt and possibly belt guard modifications may be required to permit proper belt stopping for gear shifting.         

 

I buy all my belts at TSC.    If they don't fit, you can exchange them for the correct belt. Just keep the belt and sleeve clean for a full refund.

 

 

[JoeM 8,533]

Someone here had some kind of homegrown formula for every inch of pulley subtract 2 inches of belt???? It was a long time ago when i seen that thread and not sure if it is even accurate. 

[953 nut 60,877]

2 hours ago, JoeM said:

homegrown formula for every inch of pulley subtract 2 inches of belt????

The diameter of the pulley multiplied be 3.14 will yield the circumference of the pulley but the belt generally only contacts half of the circumference, SOOOOOO, for each inch of pulley size change the belt would be 1.57" longer or shorter as the case may be presuming both pullies are relatively close in size. If you were going from a 2" to a 12" pulley that formula would be out the window because more than 50% of the 12" pulley circumference would probably be contacting the belt.

With any luck this will clarify rather than confuse the issue.