i was wondering if theres a thread on the A model engines thru C models that breaks down all the engine and pump numbers im trying to understand this stuff a little better i looked thru it but couldnt find anything
Here is a bit of a list not completely accurate but is is a start http://www.toughquip.com/CAT-Truck-Engines.htm
It is listed on the first page of the handy links sticky
Most 3406 pre B block were 92U serial number , commonly known as A blocks, these came in directinjection and precup styles
If you start with a serial number and arrangement number, and look in SIS to see what it was built with.
Tony or Sled prolly have the combinations commited to memory, the rest of us mere mortals have to look it up.
there are specific serial points that would have a pump change , but I don't know exactly what they are except 92U
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