Ricoh D025 Service Manual page 213

Do not attach the pulley on the shaft with the screw at this time.
5. Install the wire.
The winding of the wire on the three pulleys at the rear of the scanner should
be the same as the winding on the three pulleys at the front. This must show
as a mirror image.
Example: At the front of the machine, the side of the drive pulley with the three
windings must face the front of the machine. At the rear of the machine, it must face
the rear.
6. Do steps 7 through 13 again in the "" Section.
SM 4-37
Scanner Unit
D023/D025