C4 Maintenance  10. Joint #6 
 
C Series Maintenance Manual Rev.2  145 
 
10.3  Joint #6 - Replacing the Timing Belt 
 
Removal: Joint #6 Timing belt 
1.  Turn OFF the Controller power. 
2.  Remove the Arm #4 side cover. 
For details, refer to C4 Maintenance: 3. Covers. 
3.  Loosen the Joint #6 motor unit set screw. 
Hexagon socket head cap bolt: 2-M4×15 (with a plain washer) 
4.  Remove the Joint #6 timing belt. 
 
Installation: Joint #6 Timing belt 
1.  Place the Joint #6 timing belt around the pulley 1 and 2 of the Joint #6. 
2.  Secure the Joint #6 motor unit. 
For details, refer to C4 Maintenance: 10.1 Joint #6 – Replacing the Motor, Installation steps (5), (6), (8) 
and (9). 
   
  Name  Quantity  Note 
Joint #6 timing belt (324 mm) 
Tools 
Hexagonal wrench 
(width across flats: 3 mm) 
1  For M3 hexagon socket head cap bolts 
For belt tension adjustment