C8 Maintenance 7. Joint #3
C Series Maintenance Manual Rev.2 339
Installation: Joint #3 Reduction gear unit
When tightening hexagon socket head cap bolts, refer to the 2.4 Tightening Hexagon Socket
Head Cap Bolts.
1. Apply a thin coat of grease (SK-1A) to the O-ring.
Fit the O-ring into the groove on the Arm #3.
Do not allow the O-ring to come out of the groove.
If the O-ring is swollen, damaged, or deteriorated, replace it
with a new one.
2. Install the reduction gear unit to the Arm #3.
Hexagon socket head cap bolts: 12-M4×30
Tightening torque: 5.5 ± 0.2 N·m
Installation face of the Arm #3 reduction gear unit has
clearance holes.
Install the reduction gear unit to match the screws and the
clearance holes.
3. Grease the inner side of the flexspline.
Grease: SK-1A
Grease amount: 26 g
4. Insert the wave generator to the reduction gear unit and fix it.
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