Epson C Series, Maintenance Manual, Page: 150 / 668

C4 Maintenance 9. Joint #5
130 C Series Maintenance Manual Rev.2
13. Install the Arm #5 unit to the Arm #4.
Hexagon socket head cap bolts: 6-M3×15
Tightening torque: 2.5 N·m (25 kgf·cm)
When installing the unit, insert the key to the groove and
match the grooves of the Arm #4 and the housing, then
tighten the screws. Return the key to its original
position after tightening the screws.
Key
The key is on the Arm #1, under the Arm #1 upper cover.
Hexagon socket head cap bolts: M3×6
14. Install the Joint #6 flange unit.
Hexagon socket head cap bolt: 6-M3×15
Tightening torque: 2.5 N·m (25 kgf·cm)
15. Install the Arm #4 plate.
Hexagon socket head cap bolts: 6-M3×12
Tightening torque: 2.5 N·m (25 kgf·cm)
Hexagon socket head cap bolts: 4-M4×10
Tightening torque: 4.9 N·m (50 kgf·cm)
Arm #4 plate