Do I have a CA Disc Here? Measurement Request
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=141375
Printed Date: 01 Jan 2026 at 1:51am
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Topic: Do I have a CA Disc Here? Measurement Request
Posted By: DakotaSteve
Subject: Do I have a CA Disc Here? Measurement Request
Date Posted: 12 Aug 2017 at 7:44pm
20" cut away discs in front...18" in rear...spacers in frame on front gang per manual....but the manual doesnt tell u where to measure from for width confirmation or snap coupler tounge length....anyone help me out? Im pretty sure its either the 5.5' or 7' CA disc. Thank you.  
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Replies:
Posted By: DennisA (IL)
Date Posted: 12 Aug 2017 at 8:06pm
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Sure looks like one to me. ------------- Thanks & God Bless Dennis |
Posted By: DakotaSteve
Date Posted: 12 Aug 2017 at 10:51pm
| Thanks Dennis. Il catch up w ya tmrw btw. |
Posted By: DakotaSteve
Date Posted: 13 Aug 2017 at 4:02pm
Could domeone with a true 7' mounted CA disc please take a hitch length measurement for me between these 2 points? Id sure appreciate it. The reason id like the measurement taken out to the flat steel is then it shouldnt matter if its pin or snap style. 
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Posted By: DennisA (IL)
Date Posted: 14 Aug 2017 at 1:01pm
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Steve, I measured my WD disc from the main frame to the end of the snap-coupler loop. The measurement was 46". All the #20 disc's used the same drawbar so the measurement will not help your cause. The best way is to count the coulters on the back gang. 5-1/2' will have 6 per side. 6-1/2' will have 7 per side The 5-1/2' & 6-1/2' both have spacers between the spools. The 7' & 8' don't 7' will have 7 per side 8' will have 8 per side Allis only made these 4 disc sizes in the 20 series. ------------- Thanks & God Bless Dennis |
Posted By: DennisA (IL)
Date Posted: 14 Aug 2017 at 1:53pm
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Can you post a good picture of just the spools between the coulters? ------------- Thanks & God Bless Dennis |
Posted By: DennisA (IL)
Date Posted: 15 Aug 2017 at 12:34am
http://s161.photobucket.com/user/caallis/media/CA%205%20Foot%20Mounted%20Disc/IMG_1445_zps9vc3bt9y.jpg.html" rel="nofollow"> According to the Allis Dealer Parts Book of 1961, only the 5-1/2' & 6-1/2' CA disc had the spacer between the spools as pictured. http://s161.photobucket.com/user/caallis/media/CA%205%20Foot%20Mounted%20Disc/2017-08-12_zpspdpkbnml.jpg.html" rel="nofollow">  The front gang with 5 disc's per side would make this a 5-1/2' disc. http://s161.photobucket.com/user/caallis/media/CA%205%20Foot%20Mounted%20Disc/2017-08-12-1_zpskhjdovr0.jpg.html" rel="nofollow">  The back gangs with 6 disc's per side would make this a 5-1/2' disc. http://s161.photobucket.com/user/caallis/media/CA%205%20Foot%20Mounted%20Disc/IMG_1443_zpsvfp6fbik.jpg.html" rel="nofollow">  Nice setup Steve & a great find. ------------- Thanks & God Bless Dennis |
Posted By: DakotaSteve
Date Posted: 15 Aug 2017 at 8:21am
| Thanks alot for all the research. This should help anyone who is looking to sort out what they have! Very cool. |
Posted By: Steve A
Date Posted: 15 Aug 2017 at 12:00pm
| I'll add my thanks as well. I purchased what I now know is a model 20 a couple weeks ago to use with my WD's. Evidently I have a 7 ft one (thought it was 8 by measuring, but doesn't really matter) and keys out the WD, as it does not have the spacers. I have been looking for one for several years. Freed it all up, but haven't used it yet. I'm curious to see how it does. |
Posted By: DakotaSteve
Date Posted: 15 Aug 2017 at 10:19pm
| Very cool Steve post a couple pics if u get time. |