Chapter 8 Maintenance and Inspection
42
If it is necessary to access the device for inspection while the device is in operation, cover the
rotation section. Otherwise, you could get caught by the rotation section, which could result in
serious injury.
8.3. Lubricant replacement
8.3.1. Lubricant replacement time
When this product is operated with an appropriate amount of lubricant
filled, the standard lubricant replacement time due to lubricant degradation
is 20,000 hours. However, when operation involves a reduction gear
surface temperature above 40°C (the
area in the right diagram),
the state of degradation of the lubricant should be checked in advance and
the lubricant replaced earlier as necessary. For the lubricants specified by
Nabtesco, refer to “4.2.7 Lubricants”.
8.3.2. Lubricant replacement procedure
This section describes how to replace lubricants.
Perform steps 1 to 7 by taking care regarding the following precautions.
• When handling the lubricant, be sure to wear protective goggles and rubber gloves.
When replacing the lubricant, turn OFF the power source (e.g., power supply) and execute
lock-out/tag-out so that the power will not be turned ON by accident. Otherwise, you could be caught
by the rotation section, which could result in injury.
If the lubricant gets in your eyes or touches your skin, it could cause inflammation.
When the safety cover near the reduction gear has been removed for replacement/maintenance of
lubricant, be sure to return them to their original positions after the procedure.
Fig. 8-1
Ambient temperature (°C)
R
ed
uc
tio
n
ge
ar
s
ur
fa
ce
te
m
pe
ra
tu
re
(
°C
)
