Siemens 680 - Manual (Page 14)

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Maintenance
Preventive Maintenance
Motors are designed to give many years of reliable
service with a minimum of attention. Trouble-free
operation cannot be expected if proper maintenance
is postponed or neglected.
Provide proper maintenance on the equipment.
Follow carefully the instructions contained herein. Be
certain personnel review, understand, and follow
these procedures during periodic maintenance
inspections.
DANGER
Hazardous voltage.
Will cause death, serious injury,
electrocution or property damage.
Disconnect all power before working
on this equipment.
Maintenance should be performed
only by qualified personnel.
CAUTION
Flying dirt, dust or other particles.
May cause eye injury.
Wear safety glasses and dust mask when using
compressed air.
CAUTION
Loose parts or fire.
Can result in product failure or serious property damage.
Maintenance Checklist
1. Verify motor is clean and verify that stator and
rotor ventilation passages are unobstructed.
2. Check for excessive loading or service factor.
3. Verify winding temperature rise not in excess of
rated value.
4. Verify insulation resistance is above
recommended minimum.
5. Verify voltage and frequency variation.
6. Check air gap.
7. Verify that bearing temperatures are within limits
and that lubricant is clean and proper level
maintained.
8. Verify no unusual vibration or noise exists.
9. Check
alignment.
10. Check for proper lubrication.
A definite schedule of preventive maintenance
inspections should be established to avoid
breakdown, serious damage and extensive
downtime. The schedule will depend on operating
conditions and experience with similar equipment.
To assure adequate maintenance, and warranty
consideration, it is essential that complete records
be kept for each motor, including description and
rating, maintenance schedule and repairs required
or carried out.
This checklist does not represent an exhaustive
survey of maintenance steps necessary to ensure
safe operation of this equipment. Particular
applications may require further procedures. Should
further information be desired or should particular
problems arise which are not covered sufficiently for
the purchaser’s purposes, the matter should be
referred to the local Siemens Sales Office.
WARNING
Improper maintenance can cause death, serious
injury or property damage.
Use only factory authorized parts for repair of
equipment.
Maintenance should be performed only by qualified
personnel.
Inspection
Each motor should be inspected at regular intervals.
The frequency and thoroughness will depend on the
operating hours, nature of service, and the
environment.
Antifriction Bearing
Access to the motor interior can be gained by
removal of the bearing housing.
1. Remove the bolts holding the inner bearing end
cap to the housing.
2. Remove the bolts holding the bearing housing to
the yoke.
3. Remove the bearing housing by pulling it away
from the face of the yoke. See Air Deflector.