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Track Chain Mod M

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=131767
Printed Date: 31 Oct 2025 at 9:52am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Track Chain Mod M

Posted By: 1952Dan
Subject: Track Chain Mod M
Date Posted: 24 Nov 2016 at 10:22am

Does any one out there have any data on chain rail links for Mod M
What I would like to know if there is any cross over numbers to new made links like Berco or any other makers ?
What I do know is not much is that there are 3 types AC made for the Mod M . The first type used on tractors prior to sn. 4142 had rails 1" wide Part no. 045001 right side bar 045002 left side bar .31 of each side of bar for one track.
Then the second type rail bars used on tractors sn.4142 threw 12569 had rails 1.25"wide part No. 031651 left bar & 031652 Right bar .
Then the third type used on tractor after numbers 12560 1.25" wide rails as well but look to be a little bit stronger on the bolt hole side. Also if any one knows of any useable track chain or track 18 inch wide shoes or under only really need one good chain my grousers (shoes )are all good .Any leads would be appreciated.

Replies:

Posted By: everett048
Date Posted: 24 Nov 2016 at 3:21pm

Track pin diameter 1 1/4" Track bush diameter 1 7/8" my parts book shows all track bolt diameter at 7/16 .Early rails could be split any where no master link last type had a master pin and could only be split in 1 place.

Posted By: 1952Dan
Date Posted: 25 Nov 2016 at 12:06pm

Thanks for your reply .So from what you said the pins on last mod must be mushroomed over some what on ends so they can not be moved .So if a repair is needed the pins must be drilled out and replaced with a master pin ? One whole side track looks real bad it is an old 1" rail kind and most links are cracked ,Bushings worn to pins .and all the grousers look fine . So looking for one good chain .The other side has been replaced with a later 1.25" wide rail link type. It shows no wear on the bushings and looks happy .

Posted By: everett048
Date Posted: 25 Nov 2016 at 2:14pm

The master pin is around 1/8" longer than the rest of the pins if you heat the rails around the pin and have a helper with a Big Hammer then punch it out best to take two plates off and have the master pin nr the back of the sprocket and then pound it out we have done it several times.

Posted By: Ray54
Date Posted: 25 Nov 2016 at 3:07pm

Has scratching my head where is the matching good chain? Someone only had money for one new chain buy the other later?

Oh well who am I to ask such questions,I have a HD5 one chain had new pins and bushings and the other had them turned. I do know the reasoning on this,Uncle bought it new farmed with it.Planted 500 to 600 acres a year summer fallowed similar acreage,all with HD5 an a JD A. Most fallow acreage was worked with a one way disc(for Canadians a discer) always ran with the track in the furrow. Had a total rebuild at the time to turn bushing in track(had a real good year I think)he wanted new dealer said turning would give more service for the dollar spent. Well in this case turning was fine,out of ajustment at this time on both sides. Needs new chain if I keep running it. The track has more side ware than any other track chains I have observed,from the running in furrow I guess.

Posted By: WM5377
Date Posted: 14 Jan 2024 at 4:20pm

Anyone have the info the OP was looking for? any cross reference for replacement chain?

Need minimum of 2 replacement chains for our M.