C8 Maintenance    2. General Maintenance 
 
C Series Maintenance Manual Rev.2  193 
2.3.8 Joint #6 Bevel Gear 
 
  Remove the Arm #5 grease inlet cover. 
Hexagon socket head cap bolts: 4-M3×6 
  Remove the O-ring located in the base groove. 
  Apply grease to the mating surface of the bevel 
gear inside the Arm #5. 
Grease: SK-2 
Grease amount: 2g 
  Apply a thin coat of grease (SK-2) to the O-
Fit the O-ring into the base groove. 
 
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. 
  Install the Arm #5 grease inlet cover. 
Hexagon socket head cap bolts: 4-M3×6 
Tightening torque: 2.0 ± 0.1 N·m