D4 30A Engine Serial Number

Thats the model number of the engine, D315, same as a 6 or 7U series D4.

[img]/media/kunena/emoticons/clap2.gif[/img]nice rig
Two locations on the rear of tractor 🚜 and another one on the engine behind the governor. If tag is missing look closely, sometimes the S/N is stamped into the block under the tag. Both engine and chassis S/N's should be the same

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AUSTRALIAN BUILT  D4 30A EQUINALENT SERIAL NUMBER FOR MANUALS        [attachment=72905]Capture.JPG[/attachment]

Thank for the info. That is very useful. I have to rebuild the engine. It has failed 1 and 2 big end bearings and I am trying to find a parts book for the engine.

Hey John - I have a 29A D4 (only since recently). I'm using parts and service manuals for the 6U/7U tractors. I don't know if 29A/30A manuals exist.

I've been working on the assumption that the 29As and 30As correspond to 6U/7U serial numbers for the same years (like if the skid units sent to Aus were made with the same parts as an equivalent current 7U). If my thinking is sound, you could use a 7U parts manual as if your tractor is between serial 7U42000 and 7U44307. Seems 30As were built in 1958 and 1959.

The engine and transmission parts I find on mine seem to correspond to the later revisions in the parts manual (changeovers that happened around ~40000 in 7U).

Paul.