Usually the dimension is set by the distance between the front of the guide over the adjuster screw and the rear of the yoke that pushes the idler forward.
The D7-3T operator's manual says not to exceed 8 1/4 inches between the adjacent faces of guide assembly, and front idler arms.
John
Here is a photo of a D7 track adjuster shafts.
Probably should keep 2 inches inside the nut section.![]()
Thank you sir. Pic answered my questions!!