2.2 MAINTENANCE
2.2.1 DRIVE MOTOR
(1) Check the following points with the motor running
Check item Location Criteria Remedy
Environment
Dust Motor frame
No remarkable deposit of dust allowed
compared with usual operation.
Usual temperature rise.
Visual check.
If too much deposit of
dust is found, stop the
motor and clean.
Foreign matter,
splash, liquid
Motor frame
No remarkable change allowed
compared with usual operation.
Visual check.
Return to normal
condition.
Temperature rise
Motor frame,
bearing
No remarkable rise in temperature
allowed compared with usual operation.
Temperature is below specied values:
Motor frame : 80°C [176°F]
Bearing : 55°C [131°F]
Return to normal
condition.
Vibration
Motor frame,
bearing, and
cover
No remarkable vibration or amplitude
increase allowed compared with usual
operation.
Visual and audible checks.
If allowable limit is
exceeded, stop the motor
and remove the cause.
Noise
Motor frame,
bearing, cover
No remarkable noise or sound allowed
compared with usual operation.
Using a sound-check rod, check against
new product.
Audible check.
If any defect is found,
stop the motor and
remove the cause.
(2) Check the following items with the motor stopped
Check item Location Criteria Remedy
Tightened areas
Screws and
nuts
No looseness, adherence of dust, or
corrosion allowed.
Check visually and by tapping.
Retighten, clean or
paint.
Terminals
Connections
Connections are correct and not loose.
Proper insulation is ensured.
Visual check.
Retighten.
Check for insulation.
Lead wires
No damage to coating allowed.
Visual check.
Ask specialist for repair.
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