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The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
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H3/HD3 Missing serial number
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CJWJ View Drop Down
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Joined: 27 Jul 2025
Location: 12758
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CJWJ Quote  Post ReplyReply Direct Link To This Post Topic: H3/HD3 Missing serial number
    Posted: 27 Jul 2025 at 1:58pm
I've looked all over my H3/HD3 Allis Chalmers for a serial number but cannot find anything that correlates to a serial number. I'm sure this tractor was made in the 1960s but I can't find any indication of the number of hours on the machine. Sharing this photos in case anyone understands what it means -- DC23S is imprinted on the right side (pictured). 11913 is engraved on a plate behind the blade. GDN16802 F on the muffler or exhaust.. Hoping to list this for sale.
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wade89 View Drop Down
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Joined: 12 Feb 2018
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Points: 222 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wade89 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2025 at 2:05pm
That’s a casting number. The serial is stamped into the bell housing of transmission where it bolts to the engine. Should be on upper left side as you sit on it.
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CJWJ View Drop Down
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Joined: 27 Jul 2025
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CJWJ Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2025 at 12:58pm
I think I found it—H-2296-R -- still unclear on if it is a 1961 or 1962.
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DrAllis View Drop Down
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Points: 22121 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2025 at 1:14pm
1961 build
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Points: 1074 		Post Options Post Options   Thanks (0) Thanks(0)   Quote im4racin Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2025 at 6:17pm
That is the engine number
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DrAllis View Drop Down
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Points: 22121 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2025 at 8:47pm
Chassis s/n began at 1001.  Gas engine s/n for an H-3 also began at 1001. So, figuring there weren't many HD-3 diesel engines built, it still probably makes it a 1961 chassis build. 1962 models started at 3199. I don't think they made 900 diesel versions in 1961. But who knows? Maybe the HD-3's had chassis serial numbers all their own?

Edited by DrAllis - 28 Jul 2025 at 8:56pm
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Gary View Drop Down
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Joined: 13 Sep 2009
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Points: 5905 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2025 at 7:48pm

Tractordata lists the H3 and HD3 separately, but list the same Serial Number Range for each year, H3 and HD3.

G
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Alex09(WI) View Drop Down
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Joined: 15 Mar 2012
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Points: 1759 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2025 at 10:45pm
YOU NEED THE TRACTOR SERIAL #, THE PIC YOU POSTED IS THE ENGINE SERIAL #.

I just had H3 #9866 pull up to my store last week with engine serial #H-2596-R. Engine appears to be original based off paint, etc. I believe the H-xxxx-R format is for the crawlers with G160 engines that started at crawler serial #6959. The 149 engined H3 crawlers have engine serial # of 3-xxxx-R


Edited by Alex09(WI) - 02 Aug 2025 at 10:46pm
www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
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