Rockwell Automation HPK-Series Asynchronous Servo Motor - Manual (Page 29)

HPK-Series Asynchronous Servo Motors 29
Publication HPK-IN001C-EN-P - June 2010
Troubleshooting and Maintenance
Standard troubleshooting and maintenance of this motor requires completion of these tasks:
• Bearing inspection
• Bearing greasing and repacking
• Periodic lubrication of a motor
• Shaft key removal and installation
Bearing Inspection
Frequent bearing checks are recommended. If bearing or motor temperatures become excessive,
investigate the cause. Total bearing temperatures should not exceed 90 ºC (194 ºF). Causes of
high bearing temperature are typically due to these conditions.
• Contaminated grease
• Insufficient or excessive amount of grease
• Incorrect grease
• Excessive load or thrust due to misalignment or motor overload
• Loose bearings
• Bearing failure
• Excessive ambient temperature
Grease and Repack Bearings
Follow this procedure when packing new bearings or repacking bearings after servicing a motor.
1. Apply one continuous bead of grease around the inboard side of the bearing, between
the bearing and the inner cap.
2. Apply one continuous bead of grease around the outboard side of the bearing, between
the bearing and the inner cap.
3. Verify that the grease applied in steps 1 and 2 adheres to the balls or rollers.
4. Completely fill the grease inlet and outlet passage holes with grease.
5. Fill the outboard bearing cavity 60…90% full of grease.
BURN HAZARD: Outer surfaces of the motor can reach high temperatures during
motor operation.
Take precautions to prevent accidental contact with hot surfaces. Consider motor
surface temperature when selecting motor mating cable connections.
Failure to observe these safety procedures could result in personal injury or
damage to equipment.