c clutch 8 1/2" or 9"
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=188455
Printed Date: 22 Oct 2025 at 2:25am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: c clutch 8 1/2" or 9"
Posted By: HudCo
Subject: c clutch 8 1/2" or 9"
Date Posted: 25 May 2022 at 9:27pm
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the clutch is on its way out on my i wanted to order a clutch and have it here before i took it apart, is there to tell if it is 8 1/2" or 9" without splitting it ?
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Replies:
Posted By: Rick
Date Posted: 26 May 2022 at 4:28am
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The "C" Allis should have the 8 1/2" clutch unit in it...I've never saw anything else in them besides that unit...I think only the early "B's" had the 9" unit in them...
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Posted By: PaulB
Date Posted: 26 May 2022 at 6:18am
If it has electric start, it MUST have the 8-1/2" clutch. Only crankstart tractors can fit the 9" clutch into the bellhousing with the size of the flywheel. This applies to B,C & CA tractors. Crankstart tractors can possibly have the 8-1/2" either by just useing the 9" pressure plate or redrill the flywheel for the smaller pressure plate. I've seen a lot of Crankstart tractors with a 9" flywheel and pressure plate with an 8-1/2" clutch disc.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: HudCo
Date Posted: 26 May 2022 at 9:22am
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thanks you guys, i will go ahead and order an 8 1/2" this time of year its hard to get my own stuff close to the shop for very long
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Posted By: Rick
Date Posted: 26 May 2022 at 12:39pm
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At the end, all of the B/C/CA's had the 8 1/2" clutch unit in them...yep, all of the crank start were 9" on the B's for sure
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