need shift pattern for a 1945 12 motor grader

Being a 1945, it can be either a late 9K or an early 7T series grader. As far as I know they were basically the same grader, the serial numbers reached 9K9999 and they started with 7T1 on the next machine sometime in 1945.

D4600 6 cylinder 4-1/4" bore x 5-1/2" stroke diesel, 75 hp @ 1400 rpm full load.
12' moldboard
21,500 pounds standard machine w/o extras.

Can't help on the shift pattern.

Congratulations! any pictures?

Being a 1945, it can be either a late 9K or an early 7T series grader. As far as I know they were basically the same grader, the serial numbers reached 9K9999 and they started with 7T1 on the next machine sometime in 1945.

D4600 6 cylinder 4-1/4" bore x 5-1/2" stroke diesel, 75 hp @ 1400 rpm full load.
12' moldboard
21,500 pounds standard machine w/o extras.

Can't help on the shift pattern.

Congratulations! any pictures?

I am sure I have most all the books on that grader but need the serial# and will be glad to send a pic of the shift pattern if I can get the darned camera to transfer the pics to the computer. Maybe someone will beat me to it. Charlie

thanks Charlie, I've got a bear hunt tomorrow but I will get the serial # here in a day or 2

Hi, Lineman.
What you have there, if my memory serves me right, would be a standard 'H' pattern gear shift in the main box and Hi-Low on the range lever with Hi being to the rear, giving you 6 speeds forward and 2 reverse.

How-wevver, it is not quite as simple as that. The easiest way to describe it is:

1st Low = 1st gear
1st Hi = 2nd gear
2nd Low = 3rd gear
2nd Hi = 4th gear
3rd Low = 5th gear
3rd Hi = 6th gear

In practice, theoretically, you would move the range lever for every change and the main box for every second change.When actually roading the machine, you can usually take off in 4th gear and then change through 5th and into 6th. I doubt you will become too intoxicated by the exuberance of your velocity. The old girls are flat out at around 20 mph - on the flat.

Reverse is pretty self-explanatory - reverse-Low = low reverse, reverse-Hi = hi reverse. Later model Cat 12's from somewhere during the 21F model run had a second reverse in the main box giving 4 reverse gears total.

Hope this helps.

here is a pic

muzz

Thanks everone for your help, I will try and get a few pics of the old girl up and going.