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Discussion Starter #1
I am looking to refresh my capstan machines. After researching the capstan rollers part ID #s i wanted to rder a set of regular rollers and the "high speed" rollers. Can anyone confirm my part number so I can order the right ones?

Also can anyone tell me the ground speed differenc between the "regular" capstan rollers and the "high speed" rollers?

For the regular rollers I have part #s: 607658/607657

For High speed rollers I have part #s: 610441/610440

I also found part numbers: 610475/610476
I also found part numbers: 611265/611266

Can anyone confirm what these sets are for??

Thanks
 

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Hi! 607657 and 607658 are .88 dia. 610844 and 610845 are 1.00 dia. 610440 and 610441 are 1.12 dia. Here is some additional information on the ground speed/gear ratio/capstan diameter. Bill

Model 8237 lists 611611/611612, 610475/610476, and 611265/611266 so these numbers would be for F series.

Looks like you would have to count the teeth on the drive gear and driven gear to see what the ratio is and then factor in the capstan diameter.

https://lookup3.toro.com/ttcGateway/acrobat/manuals/lball43.pdf
 

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Lifetime Lawn Guy
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I've put a larger diameter set on one of mine and was happy with the speed improvement. I'd say it's about equal to or maybe a little slower than 2nd gear on a duraforce model now, to give some prospective. Though it has been a few weeks since I ran it...

I've also read about some D series models that require changing of gears plus the capstans to attain the ground speed you want.
 

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Discussion Starter #4
Thanks fellas, I have two 8237s that I am going to service the capstans on and wanted to experiment with the roller diameters and ground speeds. I am wondering if the smaller rollers would result in a "better" gear ratio for hill climbing- meaning the slower speed results in better torque to grunt up a hill rather than using a faster speed and effectively losing the gear ratio to climb a hill. We have decent hills in my yard.
 

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Hi! Not sure, but common sense would dictate that the smaller capstan rollers would pull better on a hilly terrain and the larger rollers would be better for more ground speed on large flat areas. I also think, especially on hills, that having good quality rollers with teeth that have a good bite and also having newish rear wheels that the rubber is still soft on, as well as proper adjustment to the drive engagement, is the key to the best drive. Bill
 
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