Cat 212 motor grader serial number year help?

The 1R series 212 graders were tandem drive models powered by the 3.75" bore x 5" stroke 4 cylinder diesel D3400 engine also used in the J series D2's. Gasoline models of that era used the same size engine as the diesel models. Tandem drive gasoline models would have been 2R and single drive were 8M.

The 9T series 212 grader came out in 1947 using the D311 4" bore x 5" stroke diesel engine. I don't think there were gas engine or single drive graders produced concurrent with the 9T

There should be matching serial number tags on the engine block near the pony motor controls and on the grader frame, somewhere forward of the cab. Engine swaps were pretty common, so the tags don't always match.

[quote="links56"]Hey guys I have 2 old road graders I might let go, I'm not sure yet but I was curious about the year. The first one I believe is a 212 the serial number on the machine and the engine are identical. It's "1R 337 S P" it has a 4 cup diesel with a pony motor. Is this the same motor that was in the D4?

The other one is gas and I'm not sure on the model but the serial number is "9 187".

Any info and help with the year would be greatly appreciated. Thanks in advance.[/quote]

Can you post some photos of the gas grader?

Probably a #10 Autopatrol
My info also says possibly could be a #11. There are mistakes involving other newer graders in that table that I know are mistakes, so I wouldn't say any of that info was certainly correct.

There are several guys here that have some of those old style graders, so someone will be along soon with better info. In the meantime, please post pictures of them both.

Hi Team,
scan below from my Earthmoving Guide To Profit (Early Version of Performance Handbook) Fourth Edition, Form No 717-31397, Dated 1955.
Hope this Data is more correct than other forms.
Cheers,
Eddie B.

http://www.chriscomachinery.com/Graders.htm

Has them listed by model, then serial/year.
Looks like you have a #10 Auto Patrol '33-'34, and the 212 from '40

Someone mentioned a manual, I found my parts catalog on EBay, was printed in '48. No luck yet on an old service manual. The Jasco? Manuals I've read have poor print quality.