Siemens 580 用户手册

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Can cause death, serious injury or property damage. 

 

Do not modify or change any motor accessories, which 
are not suitable for the area classification. Any part 
replacements are accurate duplicates of the original to 
maintain the hazardous area classification. 
Consult manufacturer for the replacement part and for 
repair process. 
 

 
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.  It will be necessary to 
first remove the fan housing and external fan 
from the non-drive end of the motor to gain 
access to the bearing housing. 

 
Sleeve Bearing - 500 Frame 
Access to the motor interior can be gained by 
removal of the upper half of the horizontally split 
bearing bracket. 
 
1.  Remove the parting bolts at the horizontal split. 
2.  Remove the bolts at the outer circumference of 

the upper half of the split-bearing bracket. 

3.  Pull the upper bracket away from the face of the 

frame and remove bracket. 

The entire procedure can be done without disturbing 
the bearing enclosure or coupling alignment of the 
motor to the load.  The split-bearing capsule is held 
together by bolts. 
 
 
 

 
 
 
Sleeve Bearing - 580, 880, SH400, SH450, SH560 
Frames 
Access to the motor interior can be gained by 
removal of the bearing bracket as follows: 
 
1.  First remove the bearing housing cap and 

bearing liners as described under Bearing 
Replacement. 

2.  Remove floating labyrinth seals or oil seals as 

equipped. 

3.  Remove the bearing housing from the bearing 

bracket. 

4.  Carefully remove the bearing bracket with inner 

motor seal from the motor. 

 
Cleanliness 
The exterior should be kept free of oil, dust, dirt, 
water, and chemical.  It is particularly important to 
keep the air intake and exhaust openings free of 
obstructions. 
 

If equipment is operated intermittently in very damp 
locations, it should be protected by space heaters. To 
retard corrosion, grease all machined fits when the 
unit is reassembled after a maintenance check. 

 
Loading 
Overloading causes overheating and reduces 
insulation life.  A winding subjected to a 10°C 
temperature rise above the maximum limit for its 
class may have its insulation life halved. 
 
Underloading a motor is improper as it lowers the 
motor power factor and efficiency which results in 
higher power cost.