C8 Maintenance    2. General Maintenance 
 
C Series Maintenance Manual Rev.2  191 
2.3.6 Joint #5 Reduction Gear Unit 
 
  Remove the grease plug from the Joint #5 grease 
inlet of the Arm #5. 
 
  Attach the grease nipple to the Joint #5 grease 
inlet. 
 
The grease plug attaching hole located near the 
label with “5”  printed  is the Joint #5 grease 
inlet. 
Be careful not to confuse it with the Joint #6 
grease inlet. 
  Inject grease from the grease nipple using a 
grease gun. 
Grease: SK-1A 
Grease amount: 1g 
 
Be careful not to mix with the grease used in the 
Joint #6 (SK-2). 
  Remove the grease nipple from the Joint #5 
grease inlet. 
 
  Attach the grease plug to the Joint #5 grease 
inlet. 
 
If the grease plug is damaged or deteriorated, 
replace it with a new one.