The pre-stack motor is visible from the right side of the finisher below the lock bar.
Preparation
Remove:
Rear upper cover (Rear Upper Cover)
Rear lower cover (Rear Lower Cover)
Right panels (Upper, Lower Right Panels)
Disconnect motor (
x1).
Remove main board (
x17,
x44,
x8).
Remove upper bracket screw [A] (
x1).
Remove lower bracket screw [B] (
x1).
Disengage belt [A] (
x1).
Remove bracket [B] (with motor attached).
Separate bracket and motor (
x2).