Construction and other equipment - HD11 spline size (top trans shaft output)

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HD11 spline size (top trans shaft output)

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=107113
Printed Date: 20 Jul 2025 at 4:37pm
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Topic: HD11 spline size (top trans shaft output)

Posted By: Andrew_D
Subject: HD11 spline size (top trans shaft output)
Date Posted: 03 Jun 2015 at 3:29pm

I'm adding a hydraulic unit to the rear of my HD11B (not the series B, the original!) so that I can run hydraulics for our Rome disc. It is currently a bareback machine.

Looking for specs for the end of the top shaft that comes out the transmission.
Outside diameter?
# of splines?
etc?

Looking through the parts book, it looks like the top shaft is part #621678 (pg 269) and I would need a coupler similar to #068388 (pg 584). I am then going to extend that shaft back through the rear of the bevel gear housing, through a support bearing similar to page 584. Fab a bracket on the rear to hold a Williams tank/valve/pump unit that came off of an old International 2ton truck we scrapped. 1 outlet, but that's all the disc needs.

I have milled external splines on shafts before, but not internal. (And am not really tooled up to do internal.) So I'm hoping it's a somewhat standard size!

Andrew

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HD11B (S/N: 3880) ~1957

Replies:

Posted By: CAL(KS)
Date Posted: 03 Jun 2015 at 4:06pm

I would bet Gemdozer has a coupler and he is in Canada.

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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15

Posted By: Andrew_D
Date Posted: 03 Jun 2015 at 4:36pm

Good thought. I sent an email to Lazyts already - he's closer!

Andrew

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HD11B (S/N: 3880) ~1957

Posted By: Andrew_D
Date Posted: 03 Jun 2015 at 9:45pm

Lazyts emailed me back and says it is 2" diameter 15 spline.

That seems to match up with the bearing in the rear of the transmission. 069428 crosses to a 6311 bearing which is 55mm ID (120mm OD).

Now I just need to find a 2" 15 spline coupler to make an adapter shaft!

Andrew

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HD11B (S/N: 3880) ~1957

Posted By: DonBC
Date Posted: 04 Jun 2015 at 12:20am

Is Cambrian Equipment still in business in Winnipeg? It has been years since I stopped by there and they had some Allis construction equipment. I remember it as a huge messy salvage yard and the old guy that ran it was really hard to deal with.

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Jack of all trades, master of none

Posted By: gemdozer
Date Posted: 04 Jun 2015 at 2:31pm

I check this morning for the coupling and have no more

Posted By: Andrew_D
Date Posted: 04 Jun 2015 at 3:14pm

Thanks for looking Gemdozer.

Does anyone know if other makes used the same size shaft? Many from the same era used the same rear hydraulic units, winches, etc.

Andrew

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HD11B (S/N: 3880) ~1957

Posted By: JohnCO
Date Posted: 05 Jun 2015 at 12:53am

Can't hurt to call a Cat dealer.

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"If at first you don't succeed, get a bigger hammer"
Allis Express participant