C4 Maintenance  7. Joint #3 
 
102  C Series Maintenance Manual Rev.2 
7.3  Joint #3 - Replacing the Timing Belt 
 
Removal: Joint #3 Timing belt 
1.  Follow Removal steps (1) through (4) of C4 
Maintenance:   7.1 Joint #3 –  Replacing the Motor 
(with a Brake). 
 
2.  Loosen the Joint #3 motor unit set screw. 
Hexagon socket head cap bolts: 2-M4×15 
 
3.  Remove the Joint #3 timing belt. 
Remove the timing belt from the pulley 1 first. 
Then, remove the timing belt from the pulley 2. 
 
 
Installation: Joint #3 Timing belt 
1.  Place the Joint #3 timing belt to the pulley 1 and the pulley 2 of the Joint #3. 
Place the timing belt to the pulley 2 first.    Then, place the timing belt to the pulley 1. 
 
2.  Secure the Joint #3 motor unit. 
For details, refer to C4 Maintenance: 7.1 Joint #3 – Replacing the Motor (with a Brake), Installation 
 
 
Maintenance 
Timing belt 
Tools 
Hexagonal wrench   
(width across flats: 3 mm) 
1  For M4 hexagon socket head cap bolt