C8 Maintenance    8. Joint #4 
 
346  C Series Maintenance Manual Rev.2 
Removal: Joint #4 Motor 
1.  Turn OFF the Controller power. 
 
2.  Remove the following covers. 
 Arm #3 cover 
    Arm #3 maintenance cover 
 Arm #2 side cover 
For details, refer to C8 Maintenance: 3. Covers. 
3.  Pull out the cables from the Arm #3 and disconnect the following 
connectors. 
Connector: X141, X041, BT4, BR041 
(Hold the clip to remove.) 
4.  Remove the brake power supply. 
Cross recessed head screws with captive washer: 2-M3×6 
 
5.  Remove the cable bracket. 
Hexagon socket head cap bolts: 2-M4×10 
 
 
6.  Remove the Joint #4 motor unit from the Arm #3. 
Hexagon socket head cap bolts: 2-M4×15   
(with a small plain washer)