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.

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