Farm Equipment - D-21 numbers versus 426 numbers

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D-21 numbers versus 426 numbers

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=202895
Printed Date: 28 Sep 2024 at 2:35pm
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Topic: D-21 numbers versus 426 numbers

Posted By: DrAllis
Subject: D-21 numbers versus 426 numbers
Date Posted: 27 Aug 2024 at 6:51am

1963 Nebraska Test lists the first D-21 tested as chassis s/n 1012 and engine s/n as 3D-1046. Remember the s/n's start at 1001. So engine #46 was installed in chassis #12. Nothing surprising about that. 1965 Nebraska Test on the series 2 model D-21 has chassis 2109 and engine at 3D-2265. So, you can see the engine numbers gaining by 156. These extra build engines were being used in construction equipment, gen sets, etc. As time goes on the D-21 was replaced by the 220 and 210, which started with new s/n's of their own, but the 426 engines continued on with their s/n's from the first D-21 thru the last 3-D serial number used on the 426/3000 series engine in the early 1980's.