Opinion on CA/B hybrid tractors
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=178383
Printed Date: 13 May 2024 at 10:21pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Opinion on CA/B hybrid tractors
Posted By: KMAG
Subject: Opinion on CA/B hybrid tractors
Date Posted: 16 Feb 2021 at 9:11am
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I regularly see the front half of a Model B added to a Model CA rear to get a wfe on the CA or swap a CA rear to a B to get better gearing and a road gear. The result ends up with the front and rear wheels not tracking in the same ruts and frequent jury rigged steering linkage. The B steering box is rarely swapped at the same time to improve steering geometry, as many of these hybrids use cobbled drag links off the CA pitman arm (points up). Are these tractors abominations or more interesting to a collector? Here is a better example of a custom drag link off the CA pitman arm: 
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Replies:
Posted By: steve(ill)
Date Posted: 16 Feb 2021 at 9:20am
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i think its just a work tractor............ i dont see why anyone would COLLECT one.
Now a 4 speed transmission from a CA would be nice in a B..new hydraulics. Not sure about the final drives... too wide. ------------- Like them all, but love the "B"s. |
Posted By: KMAG
Date Posted: 16 Feb 2021 at 10:20am
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How do you put B final drives on a CA trans? I dimly recall they don't bolt on. Some minor machining or casting trimming was needed. Anyone here manage it? I can see the advantages of a CA trans in place of a B's 3-speed. I would still have a lighter tractor and be able to do tractor parades (10 mph min), assuming CA's extra top speed wasn't from it's taller tires. |
Posted By: DrAllis
Date Posted: 16 Feb 2021 at 11:59am
| Final drives include the rear axle tube, unlike a WD series where the tube was separate to the final drive housing. CA road gear is faster than a "B", yes. |
Posted By: steve(ill)
Date Posted: 16 Feb 2021 at 12:45pm
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Dr... the road gear of a CA is faster than a B.... Is that all in the transmission gear ratio, or is the final drive ratio of a CA drastically different than a B ?
My question is putting a CA 4 speed into a B and keeping the B narrow finals . ------------- Like them all, but love the "B"s. |
Posted By: Dave H (NE)
Date Posted: 17 Feb 2021 at 1:29pm
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have an IB with a ca 4 speed B finals and D15 gov spring [ 2000 rpm ] runs about 17 mph |
Posted By: HudCo
Date Posted: 25 May 2022 at 9:37am
| looks like the one in the picture , it dosnt steer backwards . the ball and socket end on the axle is all tie wired on and needs to be fixed before it leaves our shop here because the engine stuck over the winter |
Posted By: corbinstein
Date Posted: 26 May 2022 at 6:26am
| how do you slow a B down? |
Posted By: Trinity45
Date Posted: 26 May 2022 at 6:57am
| Not sure why anyone would want to put a B wide front on a CA since the CA came in wide front and narrow front, I have one of each. |
Posted By: juniorp53
Date Posted: 26 May 2022 at 11:13am
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there are 5 flavors of gears that fit into those finals B have 67 teeth c has 94 or 82 or 69 depending on steel or air tires and serial number while CA has 77 teeth not sure what it takes to swap back and forth , pinion shaft length would come into play i have both a B and a C (82T) .. the B is noticeable faster in 3rd in 2nd its a wash |