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bigstone 
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Joined: 15 Feb 2016
Location: minnesota
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 Topic: Allis B, C & CA Fitment
Posted: 05 Sep 2026 at 7:58am |
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Are the torques tubes with the starter hole on three models interchangeable? Your help would be appreciated. s
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 05 Sep 2026 at 8:01am |
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yes.. the torque tube and engines are interchangable... Few more taped lug holes on some, but all will fit........... transmission / rear end / final drives are different on the CA.
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Like them all, but love the "B"s.
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bigstone
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Location: minnesota
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Posted: 05 Sep 2026 at 8:19am |
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Thank you Steve.
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Kip-Utah
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Joined: 14 Sep 2009
Location: Southern Utah
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Posted: 06 Sep 2026 at 9:28pm |
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Late model B torque tubes and CA torque tubes are exactly the same.
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HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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sparky
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Joined: 13 May 2011
Location: So. Indiana
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Posted: 07 Sep 2026 at 9:47am |
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I don’t think the B has the 4 tapped mounting holes for cultivators.
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It's the color tractor my grandpa had!
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john2189
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Joined: 11 Sep 2009
Location: Minerva,Ohio
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Posted: 07 Sep 2026 at 9:53am |
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I have a B torque tube in my garage with my bench grinder mounted to it. It is the right height and heavy enough that it doesn’t move.
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'41 Allis B
'49 Farmall Cub
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Kip-Utah
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Posted: 08 Sep 2026 at 10:11am |
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I have seen several late production Bs with the CA tapped cultivator mounting holes in the torque tube.
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HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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dfwallis
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Location: Texas / Indiana
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Posted: 08 Sep 2026 at 10:38am |
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The CA is about 5 inches longer than a C, is that entirely from the rear end?
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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Les Kerf
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Joined: 08 May 2020
Location: Idaho
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Posted: 08 Sep 2026 at 11:58am |
 dfwallis wrote:
The CA is about 5 inches longer than a C, is that entirely from the rear end? |
Yes
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steve(ill)
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Posted: 09 Sep 2026 at 7:58am |
the differential case has 4 bolts that hold the final drives to each side.. The finals on the B-C are completely vertical to the case... the CA has the final cases turned slightly so the finals tilt BACKWARD somewhat.. giving a longer wheel base..
The troque tubes go by DATE.. The early B and C are identical and have no mounts for the implement... When the CA replaced the C, they added 4 tapped lugs to each side to hold implements under the tractor... at that point the same torque tube was used on the B which was still in production.
Edited by steve(ill) - 09 Sep 2026 at 8:00am
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Like them all, but love the "B"s.
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steve(ill)
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Location: illinois
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Posted: 09 Sep 2026 at 8:08am |
you can see the LUGS on the side of the torque tube... and the angle of the final drive mounting.
Edited by steve(ill) - 09 Sep 2026 at 8:09am
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Like them all, but love the "B"s.
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Les Kerf
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Posted: 09 Sep 2026 at 11:34am |
I just now did a crude tape measurement of my CA and Model C transmissions, the CA 4-speed transmission is a smidge more than 1-1/2" longer than the Model C 3-speed.
The majority of the length increase is from the rearward angle of the final drives.
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PaulB
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Posted: 09 Sep 2026 at 1:49pm |
Les Kerf wrote:
I just now did a crude tape measurement of my CA and Model C transmissions, the CA 4-speed transmission is a smidge more than 1-1/2" longer than the Model C 3-speed.
The majority of the length increase is from the rearward angle of the final drives.
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The CA is also an inch or so longer in the front support casting as opposed to a C.
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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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Les Kerf
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Posted: 10 Sep 2026 at 8:34am |
PaulB wrote:
...The CA is also an inch or so longer in the front support casting as opposed to a C. |
Is this only from the increased length of the cultivator mounts protruding to the front, or does this actually increase the length of the wheelbase?
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Kip-Utah
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Joined: 14 Sep 2009
Location: Southern Utah
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Posted: 12 Sep 2026 at 5:00pm |
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The bolt hole bosses coming through the radiator shroud on the CA is the only change. The front support casting is interchangeable between the C & CA if the radiator shroud is modified on the C to clear the bolt hole bosses.
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HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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