C4 Maintenance  2. General Maintenance 
 
10  C Series Maintenance Manual Rev.2 
2.3  Greasing 
The reduction gear units and the bevel gear need greasing regularly. Only use the grease 
specified in the following table. 
 
 
WARNING 
Before performing any replacement procedure, turn OFF the Controller and 
related equipment, and then
 disconnect 
the power plug from the power source.   
Performing any replacement procedure with the power ON is 
extremely hazardous 
and may result in electric shock and/or malfunction of the robot system.
 
 
 
CAUTION 
■ 
Keep enough grease in the Manipulator.  
Operating the Manipulator with 
 grease will cause the noise or damage sliding parts and/or result in 
insufficient function of the Manipulator
. Once the parts are damaged, a lot of time 
and money will be required for the repairs. 
■
If grease gets into your eyes, mouth, or on your skin, follow the instructions below.
 
If grease gets into your eyes
: 
  Flush them thoroughly with clean water, and then see a doctor immediately. 
If grease gets into your mouth
: 
  If swallowed, do not induce vomiting.    See a doctor immediately. 
  If grease just gets into your mouth, wash out your mouth with water thoroughly. 
skin: 
  Wash the area thoroughly with soap and water. 
 
Joint #1, 2, 3, 4
Reduction gear units  Overhaul timing 
SK-1A 
Refer to C4 
Maintenance: 
5.2, 6.2, 7.2, 8.2 
Replacing the 
Joint #5, 6  SK-2 
Refer to Maintenance: 
9.2, 10.2 
Replacing the 
 
Joint #1, 2, 3, 4, 5, 6 reduction gear units 
As a rough indication, perform greasing at the same timing as overhaul. 
However, it may vary depending on usage condition and degree of the load (such as when 
operated with the maximum motion speed and maximum acceleration / deceleration in 
continuous operation) applied on the Manipulator.