Common
8. Daily Inspection and Maintenance
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DANGER
- Do not handle the unit when cables are energized. Be sure to turn off the power when working on the unit; otherwise, electric
shock may result.
- Do not approach or touch any rotating parts (output shaft, etc.) while conducting maintenance during operation or the inspection
of the unit, loose clothing may become caught in these rotating parts and cause serious injury or death.
- In the case of
explosion proof motor
, customers must not disassemble or modify; otherwise, explosion, ignition, an electric shock,
injury, a fire, or damage to the equipment may occur.
- In the case of
explosion proof motor
, The lead-in condition of explosion proof motor shall conform to the facility’s regulations, elec-
trical codes, and explosion proofing standard, as well as the maintenance manual; Additionally, do not open the terminal box cover
while operating. Otherwise, explosion, ignition, an electric shock, injury, a fire, or damage to the equipment may occur.
- Do not operate the machine while the brake is released by the manual brake release bolt; otherwise, falling, going out of control,
or damage to the equipment may result.
CAUTION
- Do not put fingers or foreign objects into the opening of the gearmotor or reducer; otherwise, electric shock, injury, fire, or damage
to the equipment may result.
- The gearmotor or reducer becomes very hot during operation. Do not touch the product with bare hands. Otherwise, burns may
result.
- Do not touch the terminals when measuring insulation resistance; otherwise, electric shock may result.
- Do not operate the unit without a safety cover (removed during inspection) to shield rotating parts; otherwise loose clothing may
became caught in these rotating parts and cause serious injury or death.
- Promptly observe and repair any abnormalities during operation according to instructions in this maintenance manual. Do not
operate until the cause of the abnormality is understood, and the abnormality is repaired.
- When replacing the lubricating oil, follow the instructions in this manual. Be sure to use our recommended type of oil.
- Before installing, moving or transporting the equipment, be sure to drain off the lubricating oil. If you move the equipment with
lubricating oil is inside it, the lubricating oil may flow out from the oil filler plug.
- Dot not replace the lubricating oil either during operation or immediately after the end of operation. Otherwise, burns may result.
- Do not operate damaged gearmotors or reducers; otherwise, injury, fire, or damage to the equipment may result.
- We cannot assume any responsibility for damage or injury resulting from an unauthorized modification by a customer, as it is
outside the scope of the warranty.
- Dispose of the product or lubricating oil as general industrial waste.
- In the case of
explosion proof motor
When measuring the insulation resistance of explosion proof motor, confirm that there is no
gas or explosive vapor in the vicinity, in order to prevent explosion or ignition.
- Changing brake linings requires experience. Consult with the nearest authorized maintenance shop.
Brake torque will change with operation environment and conditions, the condition of the friction surface, and other factors. In
particular, brake torque may not be at the prescribed level for initial operation, and after a long period of inactivity. In such a case
turn the brake on and off under as light load as possible to contact the brake’s friction surfaces.
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. However, in case the difference
between the gear unit surface temperature and the environment temperature is approximately 60°C, there is
no particular trouble if fluctuation is slight.
Oil level
(
Oil lubrication parts
)
- Is the oil level at the center of the oil gauge when the gearmotor or reducer is stopped?
Contamination of the
lubricating oil
Is the lubricating oil contaminated?
You can check the lubricating oil for contamination not only by sampling the oil when the gearmotor or
reducer is stopped, but also by using the oil gauge.
If the oil gauge is found to be contaminated, replace the oil gauge quickly.
Oil or grease leaks
Is grease or oil leaking from the gear unit? Are the oil seal sliding surfaces corroded?
Mounting bolts
Are the mounting bolts loose?
Chain, V-belt
Are the chain or V-belt loose?
- If any problems are found in a daily inspection, follow "9. Troubleshooting" (on P71and 72) to take appropriate actions. If these actions
do not solve the issue, immediately contact the nearest authorized maintenance shop.
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