Epson RC620 Safety And Installation page 122

5. General Maintenance
C3
Joint #1, #2, #4 Reduction gear units
Joint #6
S5 / PS series
Joint #1,"#2, #3, #4, #5, #6
* Under normal conditions, the reduction gear units (LS, RS, G series) shall be
greased only when the motor is replaced. However, in case of severe working
conditions (such as high duty, high speeds, large payloads, etc.), the reduction
gear units must be greased every 10,000 hours.
110
Greasing part
bevel gear
Greasing part
Reduction gear units
Greasing Interval
When the reduction gear units are
replaced*
Annually (every 8000 hours)
Greasing Interval
Every 6000 hours
RC620 Safety and Installation Rev.8