You have a wonderful day. Best wishes. Deas Plant.
If you go to the “Machine Landing Pages” you will find the following which may help you.
There are two slides In the Family Tree page which I have used in talks on Caterpillar.
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At one time I had a "Production Handbook" from Caterpillar from the 1980's. It had a very good section on previous models, that started with the RD models (1935?, on to what was current at the time of printing ). Had serial numbers, years of production, and horsepower increases note, as well as the speed in each gear. I loaned it out to never see it again.
Are there Production Handbooks in the library?
Ok after looking in for sale and seeing Performance Handbooks for sale, has my memory got it wrong AGAIN?