C8 Maintenance 8. Joint #4
352 C Series Maintenance Manual Rev.2
Removal: Joint #4 Reduction gear unit
1. Turn OFF the Controller power.
2. Remove the Arm #4 side cover and Arm #3 cover.
For details, refer to C8 Maintenance 3. Covers.
3. Remove the Joints #5 and #6 motors.
For details, refer to the Removal steps in C8 Maintenance 9.1 Joint #5 - Replacing the Motor and C8
Maintenance 10.1 Joint #6 - Replacing the Motor.
4.
Remove the cables passing through the Arm #4 as shown in the
photo.
For details, refer to the Removal steps in C8 Maintenance 4.1
Cable Unit.
5. Loosen the fixing bolts of the Joint #4 motor plate and remove the
belt. (Do not remove the Joint #4 motor.)
Hexagon socket head cap bolts: 2-M4×15
(with a small plain washer)
6. Remove the bolts fixing the J4 flange, and remove the Arm #4 from
the Arm #3.
To remove all bolts, change the position of the Joint #4 by rotating
it.
Hexagon socket head cap bolts: 8-M5×30
C8L:
The bolts can be removed from the four through holes on the
extension flange of the Arm #4.
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