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B10 Vari Speed Pully


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#1 DanP OFFLINE  

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Posted May 14, 2012 - 06:48 PM

Can someone explain how the cast pulley on the right side of the Bevel Gear Box works. I has a plastic bearing that the pulley half runs on. I am not sure how all that works or what it is.

#2 MH81 ONLINE  

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Posted May 14, 2012 - 07:17 PM

Dan, I think there were two kinds of "vari" speed othose, could you grab a pi of the pulley at the BGB and the one at the input to the tranny?

#3 johndeereelfman OFFLINE  

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Posted May 14, 2012 - 07:23 PM

Oh Boy, I feel another PM coming! LOL

Dan, it's raining here right now, but as soon as it stops, I'll take a picture of the complete rear that I have here, and maybe that'll help explain what you're looking for.

#4 achomesteader OFFLINE  

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Posted May 15, 2012 - 06:00 AM

Dan, I can't explain exactly how the pulley works, having never had mine apart, but here are a couple of quotes from a Big Ten (1965) dealer sales training manual:

"The Big Ten's belt clutch with its very short belt and EXCLUSIVE split pulley design allows slippage, just as in automotive clutches. This helps eliminate jerky starts."

and again:

"The design of the belt clutch includes a split pulley. This allows the clutch to slip a bit which in turn helps prevent jerky starts."
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#5 DanP OFFLINE  

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Posted May 15, 2012 - 06:16 AM

Thanks that explains it, I thought it was some kind of vari speed pulley but I couldn't see how it operated.
Some where I saw a post where some one was rebuilding one and they had the new plastic bearing in it and a can of silicone spray beside it. Do you need to lubricate it? Maybe I better read the service manual about it.

#6 achomesteader OFFLINE  

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Posted May 15, 2012 - 09:16 AM

The post you mentioned was made by member B10Dave and was made on another site. Here's the link to it:

http://www.michaelst...p?TOPIC_ID=6877

I've never found any mention of lubricating any parts of the split pulley in any Simplicity or A-C publication.

#7 acguy96 OFFLINE  

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Posted June 11, 2012 - 12:00 PM

The service manual says nothing of lubricating the parts. Here's a link to that page from the service manual. Hope this helps. http://gardentractortalk.com/forums/gallery/image/11874-a-c-bevel-gear-box/

Edited by acguy96, June 11, 2012 - 12:01 PM.

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