14
8. Daily Inspection and Maintenance
15
8. Daily Inspection and Maintenance
8-1 Daily Inspection
Make certain to carry out daily inspection in accordance with Table 8-1. Lack of inspections is a source
of trouble.
Table 8-1 Daily Inspection
Inspection Item
Inspection Detail
Current value
Is the current no greater than the rated value shown on the nameplate?
Noise
Are there unusual noises, or are there extreme changes in the noises?
Vibration
Is there abnormally large vibration? Are there extreme changes?
Surface temperature
Is surface temperature unusually high? Are there extreme changes?
Temperature rises during operation will differ according to model and type. How-
ever, in case the difference between the gear unit surface temperature and the
environment temperature is approximately 40°C, there is no particular trouble
if fluctuation is slight.
Grease leaks
Is grease leaking from the gear unit? Are the oil seal sliding surfaces corroded?
Mounting bolts
Are the mounting bolts loose?
- If any problems are found in a daily inspection, follow "9. Troubleshooting" (on P16 and 17) to take ap-
propriate actions. If these actions do not solve the issue, immediately contact the nearest authorized
maintenance shop.
8-2 Main Unit Maintenance
- Because the gear unit is filled with long-lasting grease, it can be used for long time without replenishing
the grease, but maintenance with disassembly after usage for approximately 20,000 hours or 3 to 5 years
will further extend the product lifetime.
Contact the nearest authorized maintenance shop regarding maintenance with disassembly.
- Oil seals have a lifetime. During long use, natural degradation and frictional wear will reduce effective-
ness. Product operating conditions and ambient environment will cause lifetime to widely vary. Given
normal operation (uniform load, running 10 hours per day, normal temperature) as a guideline, it is rec-
ommended to change them every 1 to 3 years. If the sliding surfaces of oil seals show signs of wear or
corrosion, replace them with new ones. The sliding surface of an oil seal is made of carbon steel, so in
order to prevent rust forming on it, if there are parts of the oil seal that are exposed to the outside, periodi-
cally take steps to prevent rusting by coating the oil seal with rust preventive oil.
Contact the nearest authorized maintenance shop regarding oil seal replacements.
- If stop and start are frequent, mounting bolts (or nuts) may come loose. Periodically check for looseness
as this is a source of miss-alignment, grease leakages, and load unbalance.
