C4  Maintenance  5. Joint #1 
 
C Series Maintenance Manual Rev.2  71 
5.3  Joint #1 - Replacing the Timing Belt 
 
 
Maintenance 
Part 
Timing belt   
1 
1 
Tools 
Hexagonal wrench   
(width across flats: 3 mm) 
1  For M4 hexagon socket head cap bolt 
For belt tension adjustment 
 
Removal: Joint #1 Timing belt 
1.  Remove the Joint #1 motor unit. 
For details, refer to C4 Maintenance: 5.1 Joint #1 motor, Removal step (1) to (4). 
2.  Remove the Joint #1 timing belt. 
 
Work process is common between C4-A601** and C4-A901** 
 
Installation: Joint #1 Timing belt 
1.  Place the Joint #1 timing belt around the Joint #1 pulley in the back in the photo. 
2.  Mount the Joint #1 motor unit. 
For details, refer to C4 Maintenance: 5.1 Joint #1 motor, Installation step (5) to (9).