Looking for a service manual for my 1951 212 motor grader . On Ebay I have found service books for the D-311 motor which i have.  Where do I find the motor serial number, Because the brass tag next to the pony motor clutch handle is the same as the machine tag on the front left. The Book i found said for serial number 51B1-up  My serial number is 9T2277 both machine and motor. Am i looking in the wrong spot? Thank you

Hi, GraderManNH.
Back in those days, Caterpillar had a policy of matching the engine serial # to the machine serial # - policy dropped many years ago.

Hope this helps.

Just my 0.02.

To add to what Deas said, you need a parts book that is specific to the 9T2277, that will properly cover the engine, the 51B D311 is a completely different engine.

www.ebay.com/itm/295502927403?hash=item4...tkp%3ABk9SR-6OrbPIYQ

I’ve never found a service manual for the grader portion of a 212 either and to be honest I’ve never even seen pictures of one, I reference the service information from my 12 and 112 service manuals.  It will not help for everything but it helps within some stuff. 

Nathan, you are not the only one that is searching for one.

Hi, Folks.
Here izza link to Cat Publications:

catpublications.com/#

I don't guarantee that they have whatever you might be looking for but I suspect that it might be a good place to start.

Just my 0.02.

No luck there either Deas from what I have heard.

i had a brief look at what they had listings for some time back and it was surprising what they still had.

I have these on the shelf, for what it’s worth. Courtesy of  Gary M., a local member and great guy. JM