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COMMON
8. Daily Inspection and Maintenance
DANGER
Do not handle the unit when cables are live. Be sure to turn off the power; otherwise, electric shock may result.
Do not approach or touch any rotating parts (output shaft, etc.) during maintenance or inspection of the unit; loose
clothing may become caught in these rotating parts and cause serious injury or death.
Customers shall not disassemble or modify explosion-proof type motors ; otherwise, explosion, ignition, electric
shock, or damage to the equipment may result.
The lead-in condition of an explosion-proof type motor shall conform to the facilities electrical codes, extension
regulations, and explosion-proofing guide, as well as the maintenance manual ; otherwise, explosion, ignition,
electric shock, 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. Touching the unit with bare hands; may result in
serious burns.
Do not touch the terminal when measuring insulation resistance; otherwise, electric shock may result.
Do not operate the unit without a safety cover in place to shield rotating parts; otherwise loose clothing may
become caught in the unit and cause serious injury.
Promptly identify and correct, according to instructions in this maintenance manual, any abnormalities observed
during operation. Do not operate until abnormality is corrected
.
Change lubricant according to the maintenance manual instructions. Be sure to use factory recommended lubricant.
Do not change lubricant during operation or immediateus after stopping operation; otherwise, burns may result.
Supply/discharge grease to/from the motor bearing according to the maintenance manual instructions. Avoid
contact with rotating parts; otherwise, injury 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.
Dispose of the gearmotor or reducer lubricant as general industrial waste.
When measuring the insulation resistance of an explosion-proof type motor , confirm that there is no gas,
steam, or other explosive substance around the unit in order to prevent explosion or ignition.
8-1) Daily Inspection
To ensure proper and continued optimum operation, use Table 9 to perform daily inspections.
Inspection item Details of inspection
Electric
current Is the current below the rated current shown on the rating plate ?
Noise Is there abnormal sound ? Is there sudden change in sound ?
Vibration Is there excessive vibration ? Does vibration change suddenly ?
Oil or grease leakage Does oil or grease leak from the gear section ?
Foundation bolt Are foundation bolts loose ?
Chain and V-belt Are chain and V-belt loose ?
Oil level
(Oil-lubricated
model )
At rest Does the oil level reach the top line of the oil gauge ?
In operation When compared to the oil level at rest, is this level different ?
When using the
trochoid pump
Is the function of oil signal or flow gauge normal ?
When the function is abnormal, stop the unit and inspect it ; otherwise inadequate oil will cause poor
lubrication of reduction portion, broken pump and fill-up the oil pipe.
Surface temperature
Is the surface temperature abnormally high ?
Does the surface temperature rise suddenly ?
The temperature rise during operation differs according to the models. When the difference
between the temperature of the casing surface and the ambient temperature is approx. 50°C,
there will be no problem if there is no fluctuation.
Table 9 Daily Inspection
When any abnormality is found during the daily inspection, take corrective measures listed in section 10, Troubleshooting
(page30.) If the abnormality cannot be corrected, contact our nearest agent, distributor or sales office.
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• It is recommended to overhaul the gearmotor or reducer after 20,000 hours or 3 to 5 years of operation to ensure a
longer service life, although it depends on the operating conditions.
• Overhauls should be done by appropriately skilld our foctory technician. Please contact our nearest agent, distributor or
sales office.