Maintenance
Explosion-protected machines
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● Slightly grease the contact surfaces of the sealing lips.
Note
Special operating conditions
The operating hours are reduced, e.g.
When machines are vertically mounted.
High vibration and surge loads
Frequent reversing operation
Higher ambient temperatures.
9.5.1.1 Replacing bearings in explosion-proof machines
● When changing the bearings, renew the sealing rings and only use original
Siemens spare parts.
● For radial sealing rings with dust protection lip (DIN 3760-AS), completely fill the
spaces (100%) in the sealing ring as well as in the bearing shield hub with a
suitable grease.
9.6 Disassembly
Note
Before commencing removal, you should mark how each of the fastening elements
has been assigned, as well as how internal
connections are arranged. This simplifies
Material damage can occur by forcefully removing the fan from the shaft.
Take care not to damage the snapping mechanisms on fans that are equipped with
these.
Plastic fan
● Correctly expose the breakout openings provided in the fan plate
● Heat up the fans to a temperature of approximately 50 °C around the area of the
hub.
● Use a suitable tool to pull off the fan (puller).
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