C8 Maintenance    2. General Maintenance 
 
182  C Series Maintenance Manual Rev.2 
2.2  Overhaul (Parts Replacement) 
 
CAUTION 
■ 
properly, it may have a serious impact on safety. 
■ 
Overhaul timing is based on an assumption that all joints are operated for equal 
distance. If a particular joint has a high duty or high load, it is recommended to 
overhaul all joints (as many as 
possible) before exceeding 20,000 operation hours 
with the joint as a basis.
 
The parts for the Manipulator joints may cause accuracy decline or malfunction due to 
deterioration of the Manipulator resulting from long term use.    In order to use the 
Manipulator for a long term, it is recommended to overhaul the parts (parts replacement). 
The time between overhauls is 20,000 operation hours of the Manipulator as a rough 
indication. 
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. 
For the EPSON RC+ 7.0 Ver. 7.2.x or later (firmware Ver.7.2.x.x or later), the 
recommended replacement time for the parts subject to maintenance (motors, reduction 
gear units, and timing belts) can be checked in the [Maintenance] dialog box of the 
EPSON RC+ 7.0. 
For details, refer to the following manual. 
 RC700 series Maintenance Manual 6. Alarm 
 
Note: 
The recommended replacement time for the maintenance parts is when it reaches the L10 
life (time until 10% failure probability).    In the [Maintenance] dialog box, the L10 life is 
displayed as 100%.