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22
Common
8. Daily inspection and Maintenance
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DANGER
●
Do not handle the unit when cables are live. Be sure to turn off the power; otherwise, electric shock may result.
●
Do not touch the rotating parts (such as output shaft) on inspection while operating the machine. It may cause injury by getting
caught in the rotating part.
●
Do not disassemble or modify
explosion-proof motors
. Explosion, ignition, electric shock, injury, fire, or damage to the
equipment may occur.
●
The lead-in condition of an
explosion-proof type motor
shall conform to the technical standards for electric facilities, extension
regulations and explosion-proofing guide, as well as the maintenance manual; otherwise, explosion, ignition, electric shock,
injury, fire or damage to the equipment may result.
CAUTION
●
Do not put finger or any foreign object in the opening of gearmotor and reducer. It may cause electric shock, injury, fire, or
damage to the equipment.
●
Gearmotor and reducer become very hot during operation. Do not touch with bare hands. It may cause burns.
●
Never touch the terminals when measuring insulation resistance; otherwise, electric shock may result.
●
Do not operate the unit without terminal box cover, which was removed for inspection. Attach the cover to the same place after
maintenance before operating. Failure to do so may cause electric shock.
●
Following the maintenance manual to make corrections when any abnormality occurs. Do not start operation until the problem
is corrected.
●
Follow the maintenance manual when replacing lubricant. Always use our recommended oil.
●
Do not exchange lubricant while operation or right after the stop. It may cause burns.
●
Follow the maintenance manual when supplying or draining grease to motor bearing. Be careful of the rotating body. It may
cause injury.
●
Do not use gearmotor or reducer that is damaged. Otherwise, it may cause injury or damage to the equipment.
●
SDT cannot be responsible for damage or injury caused by products modified by the customer. It exceeds the range of our
warranty.
●
Discard gearmotor, reducer, and lubricant as an industrial waste following the local and national laws.
●
When driving an explosion-proof type motor with an inverter
, use one inverter for one motor. Use the approved inverter for
the motor.
• We recommend overhaul of gearmotor and reducer is after 20,000 hours or 3~5 years of operation. It ensures even longer service life.
• Experience and skill is necessary for overhauling gearmotor and reducers. Contact your agent, distributor, or sales office for
overhaul at our specialized factory.
8-1 Daily Inspection
Always conduct daily inspection following Table 7. Incorrect inspection may cause troubles.
Table 7 Daily inspection
Inspection item
Details of inspection
Electric current
Power source value is smaller than the rated current shown in the nameplate.
Noise
There is no abnormal sound or sudden change in noise.
Vibration
There is no abnormally large vibration. There is no sudden change in vibration.
Surface temperature
There is no abnormal temperature rise at the surface.
There is no sudden temperature rise.
(Temperature rise during operation differs for each model. There is no problem if there is no
temperature fluctuation, even if the temperature difference of the surface and ambient condition is
about 60˚C.)
Oil level (Oil - lubricated mode)
Oil surface is at the bottom side of the overflow hole at stop.
Oil or grease leakage
There is no oil or grease leak from the gear part.
Foundation bolt
Mounting bolt is not loose.
Chain and V - belt
Chain and v-belt is not loose.
When some anomaly is found during the daily inspection, take corrective measures according to section 9.
Troubleshooting (pages 35 and 36.) If the anomaly connot be eliminated, contact our nearest agent, distributor, or sales offce.
