hello this Service Manual PIONER KXE60 is very good, thanks.
Text excerpt from page 55 (click to view)
1 July 1991
5.2 DRIVE MECHANISM
[B] [F] [A] [D]
When the main motor turns, the rotation is transmitted from the development drive gear [A] to the development roller gear [B] through the development clutch [C]. (The rotation is transmitted to the development drive gear when the development solenoid [D] is de-energized.) Then, the rotation is transmitted from the development roller gear to the paddle roller gear [E] through the idle gear [F]. A gear [G] on the front end of the paddle roller shaft drives the auger gear [H] and the agitator gear [I]. The paddle roller shaft has a knob [J] on the front end so that it can be turned manually to exchange toner. The knob has a one-way clutch inside. The one-way clutch prevents the development roller from turning in the wrong direction. The development clutch solenoid energizes each copy cycle after image development is completed. This stops the rollers, reducing developer fatigue.