C4 Maintenance  8. Joint #4 
 
116  C Series Maintenance Manual Rev.2 
8.3  Joint #4 - Replacing the Timing Belt 
 
Removal: Joint #4 Timing belt 
1.  Remove the Joint #4 motor unit. 
For details, refer to C4 Maintenance: 8.1 Joint #4 – Replacing the Motor, Installation steps (1) through 
(5). 
2.  Remove the Joint #4 timing belt. 
 
 
Installation: Joint #4 Timing belt 
1.  Place the Joint #4 timing belt around the Joint #4 pulley 2. 
 
2.  Install the Joint #4 motor unit. 
For details, refer to C4 Maintenance: 8.1 Joint #4 – Replacing the Motor, Installation steps (6) through 
(11). 
   
  Name  Quantity  Note 
Tools 
Hexagonal wrench   
(width across flats: 3 mm) 
1  For M4 hexagon socket head cap bolts 
For belt tension adjustment