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Roll Shift?

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GSTROM99 View Drop Down
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    Posted: 28 Dec 2020 at 2:37pm
I was reading though my (new to me) D17 service manual, and there are references to some front wheel hub parts that are not used on "roll shift" front end tractors.  I also see "roll shift" referenced for various front end parts on the internet.  I've done the usual searches and came up empty.

What is a "roll shift" front end, and what is different about it?



Edited by GSTROM99 - 28 Dec 2020 at 2:43pm
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Brian G. NY View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian G.  NY Quote  Post ReplyReply Direct Link To This Post Posted: 28 Dec 2020 at 2:59pm
The "roll shift" front axle allows adjustment of the front wheel tread width without jacking the tractor.

If you can access the you-tube video in this link, you will see a demonstration at about 25 minutes.




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SteveM C/IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 28 Dec 2020 at 3:47pm
It was another ingenious idea from Allis Chalmers.
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john(MI) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote john(MI) Quote  Post ReplyReply Direct Link To This Post Posted: 28 Dec 2020 at 4:43pm
It is used to adjust a wide front axle.  Not as easy as it sounds, you need to be able to move the axle and the tie rod.  If they have not been cared for, it will be an interesting experience!
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Gary View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Posted: 28 Dec 2020 at 6:13pm

I thought you needed to drop a half inch bolt in to the steering arm at the wheel you were adjusting ?

............................................................

Actually you use the outer Axle Bolt that needs to be removed in order to change the Tread Width.


Edited by Gary - 29 Dec 2020 at 10:43am
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GSTROM99 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GSTROM99 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 9:42am
Oh, thanks.  I've seen that video before, but never watched the whole thing. 
My D17 has the Power Shift rears, but not the roll shift front end.
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Gary View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 10:40am

GStrom

Does your D-17 not have the adjustable Wide Front End ?

I have an Allis original Operators Instruction Manual for D-17 (printed 1960)

On page 20 it describes how to adjust the Front Wheel Tread Width using the Roll Shift Front Axle.

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GSTROM99 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GSTROM99 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 2:04pm
My wide front IS adjustable, but it has individual bolt holes instead of the long slot in the "roll shift" version.


Edited by GSTROM99 - 29 Dec 2020 at 2:05pm
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SteveM C/IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 2:38pm
Don't think slots would matter....it's the steering arm configuration that makes it possible.
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Gary View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 2:38pm

I think that may be an early D-14 Axle if there is no slot.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Acdiesel Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2020 at 5:53pm
can you post any pictures of it?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 30 Dec 2020 at 6:06pm
Non power steering models, optional until about 1959, do not have roll shift. My D17 doesn't have roll shift. I don't think it has the holes in the steering arms.
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