Epson C Series Maintenance Manual page 581

8. Remove the Joint #3 motor unit.
NOTE
Be careful not to drop the removed connectors inside the Arm.

9. Remove the Joint #3 pulley 1 and the drive boss from the
motor shaft of the Joint #3 motor unit.
Remove two screws at the flat (D-cut) part of the motor shaft
when viewing from above. (A in the figure)
Pulley and motor shaft screws (A)
Hexagon socket set screws: 2-M5×12
NOTE
Do not remove the pulley and drive boss screws (B in the

figure.
There is a brass bushing on one of the set screws.
If you removed the screws (B), be careful not to lose the brass
bushing.
Pulley and drive boss screws (B)
Hexagon socket set screws: 2-M5×6
A: Pulley and motor shaft screws
(D-cut part of the motor shaft × 2)
B: Pulley and drive boss screws
Do not remove these screws.
C: Bushing
A
B
C
B
C Series Maintenance Manual Rev.2
(with a brass bushing)
A
Pulley
Drive boss
C12 Maintenance 7. Joint #3
561