Flail mower belt pulley question

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TallCoolOne58
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Flail mower belt pulley question

Postby TallCoolOne58 » Wed Jul 17, 2019 12:28 pm

Can someone please tell me the proper fastener to use to mount the belt pulley on the PTO shaft? It appears to be a 3/16" hole maybe? Shear pin or...?
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Re: Flail mower belt pulley question

Postby Don McCombs » Wed Jul 17, 2019 2:30 pm

Cotter pin.
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TallCoolOne58
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Re: Flail mower belt pulley question

Postby TallCoolOne58 » Wed Jul 17, 2019 2:38 pm

Don McCombs wrote:Cotter pin.


Ok, thanks. Now here I thought it would be something a little more sophisticated than that. :lol:
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Re: Flail mower belt pulley question

Postby Scrivet » Sat Jul 20, 2019 5:32 pm

TallCoolOne58 wrote:
Don McCombs wrote:Cotter pin.


Ok, thanks. Now here I thought it would be something a little more sophisticated than that. :lol:

OK, a long cotter pin. :D
There's no shear possible since you have splines. It's just there to keep it from walking up or down the shaft. Can't go to far forward, but it can go real far backwards.

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John *.?-!.* cub owner
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Re: Flail mower belt pulley question

Postby John *.?-!.* cub owner » Sat Jul 20, 2019 8:42 pm

The cotter pin is just a locator, the pulley is supposed to be held in place with the bolt that pulls the clamp tight.
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Re: Flail mower belt pulley question

Postby Eugene » Sat Jul 20, 2019 8:59 pm

John *.?-!.* cub owner wrote:The cotter pin is just a locator, the pulley is supposed to be held in place with the bolt that pulls the clamp tight.
I always bolted the pulley to the shaft on my Mott.
I have an excuse. CRS.

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Re: Flail mower belt pulley question

Postby TallCoolOne58 » Sun Jul 21, 2019 9:33 pm

I don't have a bolt or clamp, didn't come with it and didn't know it was supposed to be there.
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Re: Flail mower belt pulley question

Postby Don McCombs » Sun Jul 21, 2019 10:10 pm

How about posting a photo of your pulley?
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Re: Flail mower belt pulley question

Postby TallCoolOne58 » Mon Jul 22, 2019 8:53 pm

Don McCombs wrote:How about posting a photo of your pulley?


Fair enough, I will do so in the near future. As I have stated before, when I try to post pics, it says File too large, and some have suggested I use an app to reduce pic size. Which, isn't nearly as convenient as choosing "Share".
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Re: Flail mower belt pulley question

Postby Scrivet » Mon Jul 22, 2019 10:58 pm

TallCoolOne58 wrote:
Don McCombs wrote:How about posting a photo of your pulley?


Fair enough, I will do so in the near future. As I have stated before, when I try to post pics, it says File too large, and some have suggested I use an app to reduce pic size. Which, isn't nearly as convenient as choosing "Share".

You can always dumb down your camera so it takes a lower resolution picture. Especially if you are setting out to take one to put on the forum.

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Re: Flail mower belt pulley question

Postby Don McCombs » Tue Jul 23, 2019 10:22 pm

Here are photos of Scott's mower. It's clearly a Mott mower. My opinion is that the drive pully is incorrect.
20190723_164146.jpg
20190723_164258.jpg
20190723_172610.jpg
20190723_172622.jpg
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Re: Flail mower belt pulley question

Postby Scrivet » Tue Jul 23, 2019 11:50 pm

Don McCombs wrote:Here are photos of Scott's mower. It's clearly a Mott mower. My opinion is that the drive pully is incorrect.......
I agree. Looks to me like it is a pulley off of something with a smooth shaft. Without grooves for the splines to fit into the only thing applying rotational force is the cotter key which isn't going to last long. The pictures makes the original question a whole bunch clearer now.

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Re: Flail mower belt pulley question

Postby Cubfriend » Wed Jul 24, 2019 12:47 am

If there are splines in the pulley there was one made for the 154 Loboy that looked similar. If you want to use that pulley you could tap the holes for set screws and double up on them so they don’t back out. Not the best fix. A ten spline pulley I believe 31/32 diameter shaft size would be best with tapered hub to lock in place like the Woods mowers used. Not sure what pulley diameter should be.
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Re: Flail mower belt pulley question

Postby Don McCombs » Wed Jul 24, 2019 6:07 am

Cubfriend wrote:Not sure what pulley diameter should be.

Mott parts list says 8 inches.
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Re: Flail mower belt pulley question

Postby Rick Spivey » Wed Jul 24, 2019 6:20 am

Don McCombs wrote:
Cubfriend wrote:Not sure what pulley diameter should be.

Mott parts list says 8 inches.


So I believe a Woods 42" mower pulley would be very close, I'm thinking they are at least 7", maybe slightly bigger.
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