Hi Team,
here are scans from the Service Manual for the 12E
Also attached are scans from I believe a Service Magazine article on the G Series Grader Circle Adjustments

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NOTE this article has measurements for some earlier MG's as well.
Hope these help.
Cheers,
Eddie B.

Hi, edb.
Thank you for posting those scans. I developed my own way of adjusting the circle out in the field that always seemed to work well but it is good to have the 'Great Yellow Father's' version on hand.

Just my 0.02.

Hi Team,
I guess I should add that as the front shoes wear they need to be adjusted forwards to compensate and so not allow the circle gear teeth to bottom or become fully meshed with no backlash in all positions with the drive box pinion gear, this condition overloads the circle box drive shaft and housing--it is this solid impact loading on the pinion that caused most circle box case and mounting flange failures I worked on--the shoes are supposed to take the circle pushing forward loads.
People who had issues keeping the circle drive box securely bolted to the A frame had circle gear clearance (no clearance) issues as described above due to not adjusting the front shoes forwards--just being too lazy to do it correctly because it was an extra adjustment and bolts to undo--do up, they took the easy way out.
If the adjustments are carried regulaly and anti-seize or at least grease is used on the fastener threads it is not such an arduos task.
Cheers,
Eddie B.

Really helpful advice, Eddie B. Much appreciated. Will be seeing what I can do on Saturday.

edb wrote:

Hi Team,
I guess I should add that as the front shoes wear they need to be adjusted forwards to compensate and so not allow the circle gear teeth to bottom or become fully meshed with no backlash in all positions with the drive box pinion gear, this condition overloads the circle box drive shaft and housing--it is this solid impact loading on the pinion that caused most circle box case and mounting flange failures I worked on--the shoes are supposed to take the circle pushing forward loads.
People who had issues keeping the circle drive box securely bolted to the A frame had circle gear clearance (no clearance) issues as described above due to not adjusting the front shoes forwards--just being too lazy to do it correctly because it was an extra adjustment and bolts to undo--do up, they took the easy way out.
If the adjustments are carried regulaly and anti-seize or at least grease is used on the fastener threads it is not such an arduos task.
Cheers,
Eddie B.
Good advice and information Eddie.  I adjusted my 112 a few years back and the adjusting in the operators manual leaves a lot to be desired.  I am darned lucky I didn't get the pinion and gearbox messed up as I   didn't pay much attention to the depth of the gear engagement. That could have been a disaster.  I used a pretty crude method with two come-alongs to check the slop and a couple of machinery jacks to lift the blade.  It seems to work fine.