Epson C Series Maintenance Manual page 148

C4 Maintenance 9. Joint #5
4. Install the removed bearing to the Arm #5.
5. Install the O-ring (of the Joint #5 reduction gear unit) to
the housing.
6. Install the flexspline so that the hole on the inner side can
match the bearing's outer ring.
Hexagon socket head cap bolts: 6-M3×8
Tightening torque: 2.5 N·m (25 kgf·cm)
7. Install the circular spline.
Hexagon socket head cap bolts: 3-M2×10
128 C Series Maintenance Manual Rev.2
O-ring
Bearing outer ring