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Model# of this disc?

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=48675
Printed Date: 25 Aug 2025 at 11:10pm
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Topic: Model# of this disc?
Posted By: caRon
Subject: Model# of this disc?
Date Posted: 08 Apr 2012 at 7:20pm
Bought this snap coupler disc at an auction for my ca. It measures around 6 ft across from the back. What is the model #, are manuals still available?


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CA Tractor



Replies:
Posted By: Glockhead SWMI
Date Posted: 08 Apr 2012 at 7:41pm
looks like my model 20 but smaller.


Posted By: Doug Acord
Date Posted: 08 Apr 2012 at 7:43pm
I cant help with model number. I know what auction you got that at. I am the one that bought the two bottom snap coupler plow down the line . My guess is that if find CA mounted disc manual. It will tell you every thing you need to know the find the outside disc blade and fix the hitch. However if you find a WD mounted disc manual it will probley  tell you everything you what to know.


Posted By: BrettPhillips
Date Posted: 08 Apr 2012 at 9:27pm
I'd say it's a 20 series.  Also known as a CA mounted disc harrow. Looks to be in really nice shape other than the missing blades on the rear gangs.


Posted By: CTuckerNWIL
Date Posted: 08 Apr 2012 at 9:33pm
Did they ever make a similar disc for the pin hitch set up?


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http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF


Posted By: Rfdeere
Date Posted: 08 Apr 2012 at 9:40pm
   That is an interesting question, Charlie ! I have never seen anything but plows with the pinhitch setup ?

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Randy Freshour,Member Indiana AC Partners,
http://www.rumelyallis.com" rel="nofollow - http://www.rumelyallis.com


Posted By: caRon
Date Posted: 10 Apr 2012 at 3:13pm
I've seen the 8' model 20, I like this smaller version seems that a ca would have an easier go at it. First time I've had to pay tax at an auction. This is going to be fun to restore. Thanks

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CA Tractor


Posted By: BrettPhillips
Date Posted: 10 Apr 2012 at 3:34pm
I'm pretty sure that they were made in pin hitch as well.  I have a sales brochure somewhere...


Posted By: Gary
Date Posted: 10 Apr 2012 at 4:06pm
Link to Manual on ebay:
 
   "WD" Mounted Disc Harrow ( 20 Series )
 
  Gary
 
http://www.ebay.com/itm/Allis-Chalmers-WD-Mounted-Disc-Harrows-Ops-Parts-Manual-/220779047839?pt=BI_Books_Manuals&hash=item336774eb9f" rel="nofollow - http://www.ebay.com/itm/Allis-Chalmers-WD-Mounted-Disc-Harrows-Ops-Parts-Manual-/220779047839?pt=BI_Books_Manuals&hash=item336774eb9f


Posted By: Gary
Date Posted: 10 Apr 2012 at 4:11pm
Link to Manual on ebay:
 
  "CA"  Mounted Disc Harrows   ( 20 Series )
 
   Gary
 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.l2557&hash=item336774f32f&item=220779049775&nma=true&pt=BI_Books_Manuals&rt=nc&si=MtcwJFqkbrZj9l9XbinwIbkcNlE%253D&orig_cvip=true&rt=nc" rel="nofollow - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.l2557&hash=item336774f32f&item=220779049775&nma=true&pt=BI_Books_Manuals&rt=nc&si=MtcwJFqkbrZj9l9XbinwIbkcNlE%253D&orig_cvip=true&rt=nc


Posted By: Brian F(IL)
Date Posted: 11 Apr 2012 at 8:38am
Brett is correct. They were also made in pin hitch.  I have a Dealers Parts Catalog for Disc Harrows dated May, 1958 (Got it from GlenninPA; thanks Glenn!).  It covers the parts for the No. 9, No. 11-B, No. 20, No. 40, No. 100 series #109 and #110, and No. 200 series #210, 211, 213, 214 & 215.  It shows the pin hitch for a CA No. 20 Series Harrow for 5 1/2 and 7 foot size discs as well as the 6 1/2, 7 & 8 foot sizes for D-14, D-17, WD & WD-45.
 
For some reason, for a 5 1/2' CA disc, my manual shows five cutaway discs on the front gang and six smooth discs on the rear gang.  But yours doesn't seem to be set up to handle that many.  Maybe buy one of the manuals Gary pointed out to get a better idea.  HTH
Brian



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