Need Help! Mori DL151Y - Turret Backlash Adjustment?

Hello All,

I have a 1998 DL151Y and there is backlash in the turret rotation that causes it to 'clunk' when indexing. I am trying to determine if there are backlash adjustments for each of the gears in the drive train. There seems to be at least one screw adjustment on top of the casting at the motor end. Anyone have any experience with this? The prints are no help.

Thanks!

Tom