D-21 numbers versus 426 numbers

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   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.

Edited by DrAllis - 27 Aug 2024 at 7:26am

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20528	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Topic: D-21 numbers versus 426 numbers 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. Edited by DrAllis - 27 Aug 2024 at 7:26am

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